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Published: May 14, 2024

Oral-B iO vs Genius X

Author: Jon Love (1 Comments)
Oral-B iO vs Genius X 1

Which one would we chose?

Our choice: Oral-B iO Series 9 (iO9) / Amazon, Oral-B / ~£249.99

2nd choice: Oral-B Genius X / Amazon, eBay / ~£163.53

Whilst both brushes clean the teeth very well, the iO is a much sleeker toothbrush.

It is also quieter and the brushing action softer and smoother.  

The display is innovative and makes the iO fairly unique.

I do also really like how it shows you the right amount of pressure to brush with.

If you desire to own the very best of Oral-B and what the company has to offer then the iO is most certainly the brush to pick.

Does one clean better than the other?

Simply put, no.

Technically the motors in these brush handles are different, which results in a very slight difference in the brushing action.  

Yes, there is an extra brushing mode as well as slightly renamed modes on the iO.

But, the reality is that these differences are so minute, they would likely be clinically insignificant.

There is little need to worry about these, worry more about how you use the brush on a daily basis.

It could also be argued that the enhanced real-time tracking, reporting and OLED display available on the iO would bring benefits.  There is some possible truth to this.  But, the Genius X  has real-time tracking. It just lacks some of the minor enhancements the iO offers in the app.  Even then, it is not the brush cleaning any better, it is you being educated on how to use the brush more effectively.

When to choose the Genius X instead

The only reason to choose the Genius X instead of the Oral-B iO Series 9 is the cheaper price.

Given that the technology and cleaning results are comparable, if you're happy enough with the look of the Genius X, it could be a bargain worth having. Replacement brush heads for the Genius X are half the price of those for the iO.

If you like the iO9, but don't like the price, the iO6 is our best value pick from the iO range. The compromises compared to the iO9 are not that significant for the cost savings, as we highlight in our iO comparison.

Oral-B iO Series 6 (iO6)
Oral-B iO Series 6 (iO6)
Oral-B iO vs Genius X 2 Oral-B iO vs Genius X 2 Oral-B iO vs Genius X 2 Oral-B iO vs Genius X 2 Oral-B iO vs Genius X 2

Key differences

Find out more
Electric Teeth Rating
Number of cleaning modes
Pressure Sensor
Battery life
Number of heads included
Travel case included
Bluetooth connectivity
Position tracking
Our Choice
Oral-B iO Series 9 (iO9)
Oral-B iO Series 9 (iO9)
Oral-B Genius X
Oral-B Genius X
Review Review
Oral-B iO vs Genius X 17 Oral-B iO vs Genius X 17 Oral-B iO vs Genius X 17 Oral-B iO vs Genius X 17 Oral-B iO vs Genius X 17
Oral-B iO vs Genius X 17 Oral-B iO vs Genius X 17 Oral-B iO vs Genius X 17 Oral-B iO vs Genius X 17 Oral-B iO vs Genius X 17
7 6
yes yes
14 days 14 days
1 1
yes yes
yes yes
yes yes
72dB 77dB
  • Cleaning/brushing action
    • The iO offers an oscillating-rotating cleaning action with micro-vibrations as opposed to pulsations on the Genius X.
    • The iO has a new frictionless motor which is quieter than the Genius X.
  • Handle design/colors
    • The iO looks quite different to the Genius X, with a more premium design.
    • Both brushes are available in 4 colour options, but the choices are different. The iO is available in white alabaster, black onyx, violet ametrine and rose quartz. The Genius X is available in black, rose gold, blush pink and anthracite grey.
    • The iO has a color OLED display built into the handle (black & white on Series 7).
  • Cleaning modes
    • Up to 7 cleaning modes (subject to variant) are available on the iO (daily clean, gum care, sensitive, super sensitive, whitening, intense & tongue clean) compared to the 6 on the Genius (daily clean, gum care, sensitive, whitening, pro clean & tongue clean).
  • Brush heads
    • The iO comes with 1 x Ultimate Clean brush head, compared to the 1 x Sensi UltraThin or 1 x CrossAction or 4 x CrossAction (Subject to Genius X variant)
    • The Oral-B iO’s brush heads are not interchangeable with the Genius X and vice versa.
  • Pressure sensor
    • The visible pressure sensor on the iO lights up green when the correct amount of pressure is applied and red when too much force is used. The Genius X only lights up red when too much pressure is applied.
  • Battery
    • The iO has a magnetic charging stand compared to the sit on Oral-B charging stand.
    • The iO can charge in just 3 hours compared to the 12 hours of the Genius X.
    • The Genius X has a battery charging icon/LED on the front of the brush handle. This information is displayed on the OLED display of the iO in more detail.
  • Bluetooth technology
    • The iO has enhanced AI and 3D tracking of the clean compared to the Genius X.  Subtle differences to the app. (3D tracking not available with Series 7 & 8)
  • Travel case
    • The Genius X travel case has a USB port that the iO’s case does not have.
    • The Genius X travel case holds a handle and 2 brush heads compared to the iO’s power2go case that holds the handle and 1 brush head. (No power2go feature in the case with series 7 & 8 - but holds 2 brush heads) 
  • Accessories & box contents
    • The Genius X travel case has a smartphone stand that the iO’s does not.
    • The iO comes with a brush head refill holder that the Genius X does not.
  • Other
    • The Genius X shares a power adapter for the travel case and charging stand, the iO does not.
  • Price
    • The iO is more expensive with a retail price of $299 compared to the $220-250 of the Genius X.

Please note. Every effort is made to ensure the key differences listed are correct, but these differences are subject to change without notice. Products and the box contents can be changed without notice and different variants can exist.

Video comparison

Oral-B iO vs Genius X 27

Detailed comparison: what’s the difference between the Oral-B iO and Genius X?

The iO still retains the typical design for an electric toothbrush, but it does look different to the Genius X.

The overall size and weight of the brushes are similar.

The Genius X is:

  • Height (without head) – 20.5cm
  • Height (with head) – 23.5cm
  • Width – 2.7cm
  • Thickness – 3.2cm
  • Weight (without head) – 133g
  • Weight (with head) – 138g
Oral-B iO vs Genius X 28

The iO is:

  • Height (without head) – 18.5cm
  • Height (with head) – 23.7cm
  • Width – 2.8cm
  • Thickness – 3cm
  • Weight (without head) – 131g
  • Weight (with head) – 139g

The hands-on images throughout demonstrate this design differences best but it is my opinion that the iO looks the more premium model.

Oral-B iO Series 9 - Black Onyx

It is still of a primarily plastic construction but there is a certain sleekness to the handle as there are smoother lines and less interruptions to the handle, which give it this look.

Both handles are of a rounded design, although neither are perfect cylinders.

Both brushes have separate power and mode buttons in the upper third of the handle.

With the Genius X these buttons are themselves in a rounded oval panel and have a convex design to them.  The iO buttons are concave.

Running down the majority of the handle of the X is a panel within which the icons for the brushes cleaning modes are placed, stacked on top of each other. There is also the battery status LED.

Oral-B iO vs Genius X 29

It is this panel that also highlights any particular colour accent the brush handle may have.

Compare this to the iO that does not have the same panel design, because sat between the power and mode button is an LED display that allows you to interact with the handle.

All the cleaning modes and battery information is displayed on this screen, rather than on icons on the handle.

The display allows you to select the mode you want and it allows you to see the battery charge status.  You can set the colour of the LED light ring and emoji style graphics appear on screen after each brushing session.

It is a nice way to interact with the handle.  It is a colour screen with the exception of the iO Series 7 which is black and white.

Oral-B iO OLED display

Whilst it offers a unique way to interact with the brush, the biggest benefit here is the feedback it gives at the end of the clean with these faces.  They act as encouragement around your brushing.

On the back of the Genius X handle, and wrapping around to the right and left side is a large rubber grip.  This helps retain a firm hold of the brush, even when wet.

The iO does not have such rubber grips and it arguably prioritises aesthetics over practicalities.  That said, the paint finish to the handle isn’t glossy and the brush does not feel all that slippy.

Both the iO and Genius X are available in 4 different colour options.  The iO is available in white alabaster, onyx black, violet ametrine and rose quartz. The Genius X is available in black, rose gold, blush pink and anthracite grey.  Some colours are for specific variants only.  

One of the biggest differences between these 2 brushes is the motor inside.

The iO has a new frictionless motor which has been designed specifically for the iO.

Basically it works slightly differently to the motor in the Genius X, but it achieves the same results.  The benefit being really that it is quite a bit quieter than the Genius X, about 10 decibels quieter.  

Oral-B iO electric toothbrush black onyx

Another subtle difference on the back of the change in motor is that the iO now offers micro vibrations compared to the pulsations that are offered on the Genius X.  

They pretty much do the same thing adding a 3rd dimension to the standard oscillating-rotating cleaning action that these brushes offer.

As part of both the mechanical motor change and the changes in handle design, the brush heads for the iO have changed too.

It comes supplied with a single Ultimate Clean brush head.  It is essentially a revised design of the CrossAction head typically offered with a lot of Oral-B brushes.

The Genius X comes with different brush heads, depending on the variant.  You get either 1 x Sensi UltraThin or 1 x CrossAction brush head or 4 x CrossAction heads with the Luxe model.

It is worth noting that the iO brush heads cannot be fitted to the Genius X handle and vice versa.  The design has changed in such a way that the iO can only use heads designed specifically for this model.

Both models have multiple cleaning modes.  The iO has up to 7 in total.  Those modes are:

  • Daily Clean 
  • Sensitive 
  • Gum Care 
  • Whiten
  • Intense 
  • Super Sensitive (not available on Series 7)
  • Tongue Clean (not available on Series 7 or 8)

The Genius X on the other hand has 6.  They are:

  • Daily Clean 
  • Gum Care 
  • Sensitive
  • Whitening
  • Pro Clean
  • Tongue Clean

Yes, they are different but don’t worry too much about these.  Ultimately the differences are subtle. The likes of the intense mode is basically a renamed Pro Clean mode.

Both models have an LED ring around the neck of the brush handle.  With each, this ring will be lit with a red light when excess pressure is detected during brushing.  This is designed to alert the user to relieve the pressure.

However, the iO’s light ring will also be lit green when the correct brushing pressure is applied.  You actually want the green ring to be lit for the full 2 minutes of brushing if you can.  You don’t have this on the Genius X.

Oral-B iO vs Genius X 30
Oral-B iO Smart Pressure Sensor

But, another slight difference is that the iO does not change the sound of the brush like the Genius X does when too much pressure is applied.  You only get the light warning with the iO, which is a real shame.

These brushes are both Bluetooth enabled and considered smart.  They both pair with the Oral-B app and log key data that the sensors in the brush handle records. This is often referred to as AI and 3D tracking (3D tracking not available on Series 7 & 8).

Both brushes offer this real-time tracking, showing on-screen via a graphic which teeth you have and have not brushed.  The iO has been enhanced slightly to be more accurate on the tracking and build a better picture of your overall oral health.

The setup with the iO is in principle more advanced, but unless using side by side and being extremely meticulous, the differences are quite hard to tell.  

Charging stands are provided in the box with both models.

Oral-B iO vs Genius X 31

Whilst both essentially do the same job, they are designed differently and transfer the charge at different rates.

The Genius X comes with the more traditional Oral-B charging stand that has a prong (protuberance) on it that fits into a recess in the base of the brush handle.

The standard charging stand is white in colour, whereas the stand provided with the iO is either black or white subject to the colour variant chosen.

The iO does not have a recess in the base of the brush handle.  The base of the handle has a slight concave design which aligns with the slightly convexed top of the iO’s charging stand.

Round in its design it has a slightly larger footprint than the normal charging stand.  However, it is magnetic, which means the iO is essentially attracted to the stand and held fairly securely in place.  This stand is also less sensitive to how the brush is positioned. 

The iO’s charging stand supports 100-240V compared to the 220-240V charging stand of the Genius X.

Oral-B magnetic charging stand

With the magnetic charging stand, you can recharge the iO’s battery in around 3 hours, compared to the 12 hours of the Genius X.

On the Genius X brush handle, there is a battery status icon.  You don’t have this with the iO, it has been moved to the display.  The display will show the battery charge remaining with a graphic and text percentage (%).  This percentage is set at 10% increments.  It won’t ever read 44% for example.

This is more accurate battery data than the Genius X offers, which is limited to 3 bars on the battery icon*.

Both toothbrushes have travel charging cases, but there are some subtle differences.  The Genius X case feels the more premium, although the iO’s is lighter.

Oral-B Power2go travel case

The Genius X travel case has a USB port to charge other devices such as a smartphone at the same time as you charge a toothbrush. The iO’s power2go case does not have this USB port.

The Genius X travel case has a smartphone stand in the lid of the case, which the iO’s case does not.

And rather oddly, the iO’s case holds the handle and 1 brush head when every other Oral-B travel case, the Genius X included holds the handle and 2 heads.

The cases supplied with the iO Series 7 and 8 don't offer in the case charging, but they do hold 2 brush heads.

The last difference is that the iO comes with a brush head refill case.  This is a plastic case that holds 2 brush heads upright when placed on a worktop.  It has an opaque lid that protects the heads from damage or splashes when inside and can be used to transport spare/replacement heads.  The Genius X has no such case specifically for brush heads.

Is one better priced than the other?


The retail prices of these brushes are significantly different.

The Genius X has a recommended retail price of £339.99 and £369.99 for the standard and luxe models

The Oral-B iO 9 Series has a retail price of £500.

Yes, there is an 8 and 7 Series that are marginally cheaper, but I am focusing on the top of the line model here.

I would not advise you to pay full price for either of these brushes, and I certainly would not advise the approximate £150 premium of the iO over the Genius X.

That £150 could buy about 3 or 4 perfectly satisfactory electric toothbrushes alone.

Oral-B iO Series 9 Box

However, the reality is that the iO and the Genius X are typically sold for approximately 50% less (if not a bit more) than their advertised retail price.

The average price of the Genius X is around £165-170, whilst the iO is around £250.  In fact, I expect that the iO will hit a price as low as £200.

With such sizeable discounts, these prices are more reasonable, even if they are technically still fairly expensive toothbrushes.

However, the initial purchase price is one thing, long term ownership is another.

When you factor in the price of brush heads this changes things further.

The iO has a new style of head which commands a price premium.

The Genius X works out at around 18p per day over 3 years compared to the 33p of the iO.

Clearly there is a sizeable price difference between these 2 models.  But both of these are not your standard toothbrush.

I am assuming that you want the best, so although it is quite a bit more expensive, the iO is the brush to go for.

However, if you do have a budget, the Genius X is still a very good choice.

Ultimately you should only commit to buying a brush at a price you are prepared to pay and deem valuable to you.

Please note that all prices quoted are approximates and will vary based on location, supplier and time of purchase.  These figures were correct at the time of writing and should not be relied upon as hard fact, but used as a guide during your decision process.


The list of differences between these 2 brushes is fairly comprehensive, but the reality of the situation is the differences are not that significant.

Both clean the teeth to a really high standard and have a number of smart features built into them, allowing for real-time tracking and feedback.

The iO is the nicer toothbrush to look at and handle.

The brushing experience is slightly softer and it is much quieter in use.

Innovative features such as the display and pressure sensor are nice touches, but are not essential must have features.

If you desire to own the very best of Oral-B and what the company has to offer then the iO is most certainly the brush to pick, albeit at a slight price premium.

*A previous version of this comparison suggested the iO had a superior battery life of 6+ weeks compared to the 2+ of the Genius X.

As part of our testing process, it is necessary to simulate battery use for consistency. We do this by charging the brush fully and running the toothbrush through brushing cycles until it discharges completely.

The iO continues to offer a battery life of 6+ weeks in these tests. However, repeated in hand testing has shown the battery life to only be 2 weeks. This is a discrepancy we have never previously experienced. All other brushes have to date performed almost identically during in hand test to those simulated.

Author: Jon Love

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Patrick Coenen
November 30, 2020

Seeing these brushes in cyber monday 2020, i got curious and browsing the internet i found this detailed review. thanks for all those explanations and insights in those 2 brushes. It helps me with my choosing

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