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Oral-B iO Series 7 vs Series 8 vs Series 9

Oral-B iO Series Comparison - Header Image

Which one would we choose?

Our choice: Oral-B iO Series 9 (view on Shaver Shop)
2nd choice: Oral-B iO Series 7 (view on Shaver Shop)

The iO Series 7 is the brush to go for based on features and price alone if I base this comparison on the recommended selling price of $599 (estimated).

The Series 9 is the top of the line model and will be more widely sold and promoted. However, it has a $749 price tag.

For that extra $150 the benefits are notably the 3D tracking and a travel case that allows you to charge the toothbrush whilst inside.

This, therefore, is not a justifiable premium in my mind over the Series 7.

But, the reality is that it is very likely that the iO Series 9 will actually sell for much less than its retail price and I suspect will actually sell on average around $350, thus making it a potentially justifiable premium for the extras it offers.

Our Choice
Oral-B iO Series 9 Electric Toothbrush With 4 Brush Heads, Black Onyx
Oral-B iO Series 8 Electric Toothbrush With 3 Brush Heads, Violet Ametrine
Oral-B iO Series 7g Electric Toothbrush With 1 Brush Head, Black Onyx
Oral-B iO Series 6 Electric Toothbrush with (2) Brush Heads, Black Onyx
Brush Name
Oral-B iO Series 9
Oral-B iO Series 8
Oral-B iO Series 7
Oral-B iO Series 6
Electric Teeth Rating
5/5
5/5
5/5
5/5
Price
$ 434.04
$ 364.39
$ 335.24
$ 223.89
ShaverShop
Oral-B iO Series 7 vs Series 8 vs Series 9 1
Oral-B iO Series 7 vs Series 8 vs Series 9 1
Oral-B iO Series 7 vs Series 8 vs Series 9 1
Oral-B iO Series 7 vs Series 8 vs Series 9 1
Our Choice
Oral-B iO Series 9 Electric Toothbrush With 4 Brush Heads, Black Onyx
Brush Name
Oral-B iO Series 9
Electric Teeth Rating
5/5
Price
$ 434.04
ShaverShop
Oral-B iO Series 7 vs Series 8 vs Series 9 1
Oral-B iO Series 8 Electric Toothbrush With 3 Brush Heads, Violet Ametrine
Brush Name
Oral-B iO Series 8
Electric Teeth Rating
5/5
Price
$ 364.39
ShaverShop
Oral-B iO Series 7 vs Series 8 vs Series 9 1
Oral-B iO Series 7g Electric Toothbrush With 1 Brush Head, Black Onyx
Brush Name
Oral-B iO Series 7
Electric Teeth Rating
5/5
Price
$ 335.24
ShaverShop
Oral-B iO Series 7 vs Series 8 vs Series 9 1
Oral-B iO Series 6 Electric Toothbrush with (2) Brush Heads, Black Onyx
Brush Name
Oral-B iO Series 6
Electric Teeth Rating
5/5
Price
$ 223.89
ShaverShop
Oral-B iO Series 7 vs Series 8 vs Series 9 1

Video Comparison

Oral-B iO Series 7 vs 8 vs 9

Key Differences

The following table lists the key differences between each series only.

If a feature is not listed, then it should be assumed that all 4 series have the feature. For example, all 4 have an OLED display and a built-in timer and pressure sensor.

Series 6Series 7Series 8Series 9
Oral-B iO Series 7 vs Series 8 vs Series 9 9Oral-B iO Series 7 vs Series 8 vs Series 9 10Oral-B iO Series 7 vs Series 8 vs Series 9 11Oral-B iO Series 7 vs Series 8 vs Series 9 12
Recommended Retail Price (RRP)$499$549 $649$749
Handle Colour(s)Black Onyx
White Alabaster
Light Rose

Black Onyx
White Alabaster

White Alabaster
Black Onyx
Number of Cleaning Modes5567
Daily Clean YesYesYesYes
SensitiveYesYesYesYes
Super Sensitive XXYesYes
IntenseYesYesYesYes
WhitenYesYesYesYes
Gum CareYesYesYesYes
Tongue CleanXXXYes
Interactive Display Black & White Black & WhiteColourColour
Artificial IntelligenceYesYesYesYes
3D Clean TrackingXXXYes
Travel CaseYesYesYesYes – Power2go Charging Travel Case
Number of Brush Heads Included1122
Box Contents – Oral-B iO Toothbrush Handle
– 1 x iO Ultimate Clean Brush Heads
– 1 x Travel Case
– 1 x Charging Stand
– Oral-B iO Toothbrush Handle
– 1 x iO Ultimate Clean Brush Heads
– 1 x Brush Head Refill Holder
– 1 x Travel Case
– 1 x Magnetic Charging Stand
– Oral-B iO Toothbrush Handle
– 2 x iO Ultimate Clean Brush Heads
– 1 x Brush Refill Holder
– 1 x Travel Case
– 1 x Magnetic Charging Stand
– Oral-B iO Toothbrush Handle
– 1 x iO Ultimate Clean Brush Heads
– 2 x Brush Head Refill Holder
– 1 x Power2go Charging Travel Case
1 x Travel Case Power Adapter
– 1 x Magnetic Charging Stand
Other Key InformationTakes up to 12 hours to recharge.Takes up to 3 hours to recharge.Takes up to 3 hours to recharge.Takes up to 3 hours to recharge.

iO Series 6 vs Series 7

  • The Series 7 comes with a magnetic charger that recharges the battery in 3 hours, compared to the standard Oral-B charger supplied with the Series 6 which takes up to 12 hours.
  • The Series 7 comes with a refill holder that holds and protects 2 brush heads.
  • The Series 6 is available in 3 colours (black onyx, white alabaster & light rose) compared to the 2 colours of the Series 7 (white alabaster & black onyx).
  • The Series 6 has a recommended retail price of $4499, $50 less than the $549 of the Series 7.

iO Series 7 vs Series 8

  • The Series 8 has 6 cleaning modes (daily clean, sensitive, super sensitive, intense, whiten & gum care) compared to the 5 of the Series 7 (daily clean, sensitive, intense, whiten & gum care).
  • The Series 7 has a black and white interactive display compared to the colour display on the Series 8.
  • The Series 8 is available in 1 colour (white alabaster) compared to the 2 colours of the Series 7 (white alabaster & black onyx).
  • The Series 7 has a recommended retail price of $549, $100 less than the $649 of the Series 8.

iO Series 8 vs Series 9

  • The Series 8 has 6 cleaning modes (daily clean, sensitive, super sensitive, intense, whiten & gum care) compared to the 7 of the Series 9 (daily clean, sensitive, intense, whiten, gum care & tongue clean).
  • The Series 9 has full 3D tracking for your cleaning performance that the Series 8 does not.
  • The Series 9 comes with a power2go charging case that allows the iO to be charged inside whereas the Series 8 comes with a standard travel case.
  • Both are available in 1 colour, the Series 9 in black onyx and the Series 8, white alabaster.
  • The Series 8 has a recommended retail price of $650, $100 less than the $749 of the Series 9.

iO Series 7 vs Series 9

  • The Series 9 has 7 cleaning modes (daily clean, sensitive, super sensitive, intense, whiten, gum care & tongue clean) compared to the 5 of the Series 7 (daily clean, sensitive, intense, whiten & gum care).
  • The Series 7 has a black and white interactive display compared to the colour display on the Series 9.
  • The Series 9 has full 3D tracking for your cleaning performance that the Series 7 does not.
  • The Series 9 comes with a power2go charging case that allows the iO to be charged inside whereas the Series 7 comes with a standard travel case.
  • The Series 9 is available in 1 colour (black onyx) compared to the 2 colours of the Series 7 (white alabaster & black onyx).
  • The Series 7 has a recommended retail price of $549, $200 less than the $749 of the Series 9.

These differences are explained at length later in this article. However, you might wish to learn more about each brush being compared. To do so, check out our hands-on reviews:

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.

iO Series 9 White Alabaster

Detailed comparison:Β what’s the difference between the Oral-B iO Series 6 vs Series 7, Series 8 and iO Series 9?

The number of differences between the Oral-B iO 6, 7, 8 and 9 Series is not as significant as you might expect.

Technically there are more similarities than there are differences. Here is a list of ways in which all 4 series of the iO are the same. All of the models have:

  • Built-in timer (2 minutes)
  • Built-in pacer (30 seconds/quadrants)
  • Built-In pressure sensor – lit red when pressure is too great, green when it is just right
  • Rechargeable lithium-ion battery offering 14+ days of use between charges
  • Bluetooth technology to connect to a smartphone
  • AI technology to track the location of the toothbrush in the mouth
  • Frictionless magnetic drive system
  • Oscillating-rotating cleaning action with micro-vibrations
  • Interactive OLED display to provide real-time feedback and encouragement
  • Travel case to at least store and protect the handle and 1 brush head

Not available on the Series 6 is the:

  • Magnetic charging stand
  • Quick charging – in around 3 hours

Instead, it has a standard Oral-B charger that takes up to 12 hours to recharge the brush.

It is primarily the box contents, number of cleaning modes and price that differs.

The top of the line Series 9 comes with 7 cleaning modes, whilst the 8 comes with 6 and the Series 6 and 7 comes with 5.

The modes and which model has what are listed in the following table.

ModesSeries 6Series 7Series 8Series 9
Number5567
Daily CleanYesYesYesYes
SensitiveYesYesYesYes
Super SensitiveXXYesYes
IntenseYesYesYesYes
WhitenYesYesYesYes
Gum CareYesYesYesYes
Tongue CleanXXXYes

The different cleaning modes are far from essential and not needed. The extra modes have slightly different cleaning times and settings which may make them more suitable or practical for some.

Just because the Series 7 does not have a tongue clean mode that would last for 20 seconds on the Series 9, does not mean you can’t brush the tongue with the Series 7. You would just need to use a different mode.

The lack of additional modes does not ultimately have any bearing on the cleaning results.

To learn more about the differences, do read our Oral-B cleaning modes explained article.

Oral-B iO Brushing Modes

All 4 of the variants have an interactive OLED display, however where the 8 and 9 series have a colour display, with the series 6 and 7 it is black and white.

Where the iO Series 9 stands out over the other models is the inclusion of the 3D tracking.

All have the AI to work out the position of the toothbrush in the mouth, but only the Series 9 tracks 16 different zones. The other models track just 6.

You get a more detailed visual representation of the 16 zones in the app when using the iO9. Essentially, the top of the line model makes it easier to visualise where you are doing things right and wrong.

The Series 7 comes in both black onyx and white alabaster colour options.

The Series 8 is available in white alabaster and the Series 9, black onyx.

In other regions of the world, the Series 8 is available in black onyx and violet ametrine and the Series 9 in white alabaster and rose quartz. These colour options are not currently sold in Australia.

The Series 6 is available in 3 colour options, black onyx, white alabaster and light rose.

The difference here is the colour of the toothbrush handle only.

With the black onyx models, the handle, heads, charging stand, travel case and power adapter are all black in colour.

With the white alabaster the handle, heads, charging stand, travel case and power adapter are all white in colour.

When it comes to the rose quartz and violet ametrine variants, the handles are either colour, but all the accessories are white.

Oral-B iO Series 9 Handle Colours

With the Series 6, 7 and 8 the travel case holds the brush handle and up to 2 brush heads. However, the travel case with the 9 Series holds the brush handle and just 1 brush head.

However, the 9 Series has an extra feature not available on the 6, 7 and 8.

Called ‘power2go’ the travel case with the 9 Series allows the iO to be recharged whilst sat inside.

The toothbrush is charged via a detachable power adapter.

The brush cannot recharge without the power adapter being connected.

The power adapter is proprietary to Oral-B products. It does not use the more desirable USB Type-C charging.

Oral-B iO Series 9 Box

These differences have a knock-on impact on the price. There is a $200 difference in the recommended price of the 7 Series compared to the 9 Series. $549 compared to $749.

The Series 8 is in the middle at $649.

These differences are because of the perceived value Oral-B places on the additional box contents and features each model offers.

Does one clean better than the other?

No, simply put they all clean as well as each other.

Yes, the 8 and 9 Series does have extra modes compared to the 7, but these modes don’t necessarily alter the actual cleaning results.

Instead, the modes alter a users experience and comfort with the toothbrush.

There is argument to suggest a toothbrush that suits a users needs or wants better can result in a better clean of the teeth. But, the evidence for this, particularly clinical data is basically non existant.

For many years Oral-B and other brands have offered multiple cleaning modes on electric toothbrushes and I have yet to say any meaningful data to suggest these extra modes pay dividends for the majority of users.

Oral-B iO Ultimate Clean Brush Head Professional Clean
Oral-B iO Ultimate Clean Brush Head

If your brushing technique is bad. There is a strong argument to suggest that the iO9 and its tracking of 16 zones can encourage you to brush all your teeth better than the 6 zones that are tracked with the iO 7 and 8.

The 16 tracked zones are as follows:

  • Upper rear right
    • Front surface
    • Biting surface
    • Inside surface
  • Upper font
    • Front surface
    • Inside surface
  • Upper rear left
    • Front surface
    • Biting surface
    • Inside surface
  • Lower rear right
    • Front surface
    • Biting surface
    • Inside surface
  • Lower front
    • Front surface
    • Inside surface
  • Lower rear right
    • Front surface
    • Biting surface
    • Inside surface

Whereas the 6 zones tracked with the other models are:

  • Upper rear right
  • Upper front
  • Upper rear left
  • Lower rear right
  • Lower front
  • Lower rear right

The Series 9 app screen is configured in such a way that you can clearly see which of the 16 zones you have and have not brushed.

16 dotted zones sit in the centre of the on-screen display in a circular formation. As each zone is brushed correctly, that dotted zone disappears until no dotted zones remain and all the teeth on the large visualisation turn white.

When only 6 zones are tracked, you can essentially spend all the time cleaning only 1 of the surfaces within that zone and the brush will still consider the zone brushed. That isn’t the case with the premium iO9.

Of course, with any toothbrush, iO series or not, you want to be giving fair attention to all of the 16 zones so you have an even clean to the teeth and gums.

6 zone tracking relies on you making sure you cover all the surfaces.

Thus, to master your technique the Series 9 does have that bit extra to push you to make sure you are making the correct contact with all surfaces.

But, how much difference this really makes in everyday use, is a bit subjective.

Is one better priced than the other?

Yes, the Oral-B iO Series 6 is the best value at $499.

The Series 7 is $50 more expensive than the iO6.

The 8 Series commands a $100 premium over the 7, making it $649 and the 9 Series comes in at $749.

Yes, the 8 and 9 do offer a fraction more as part of their packages, but the ‘extras’ don’t really add up to the real world price difference.

The logical and most sensible purchase of these therefore is the Series 6.

But, lets take a reality check.

These are ridiculous prices and the reality is that the typical selling prices will be at least 50% less.

This therefore makes them $200, $275, $325 and $375 respectively.

But despite the Series 6 actually being quite a bit cheaper, the Series 7 remains the best value based on actual selling price data.

But ultimately, pick the one you feel is best suited 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.

Conclusion

The differences between each model in the iO Series is relatively subtle.

As you will have seen it easily becomes confusing as to know which variant is best to buy.

All of these brushes offer more than what you need.

You do not need to spend as much as this or find a toothbrush with as many features as the iO Series to clean your teeth well.

The Oral-B Pro 2 2000 does a decent job for a fraction of the price!

That said, the iO marks a major design change in the Oral-B line up of products and is considerably quieter.

On paper alone, the iO Series 7 is the most sensible purchase based on what you get for the price. With a $200 premium price for the 9 Series, it is not the sensible choice for the limited differences.

However, the reality is that the actual selling price, not the recommended, will be such that the Series 9 will be the logical buy because the price premium over the 7 Series will be justifiable.

Your Opinions

Do you own or have you used the Oral-B iO Series?

Are there certain features that you really like or dislike?

Let us know what you think about this brush and let others who may well be considering purchasing one know your opinions before they do.

About Jon Love

Jon is a leading voice on electric toothbrushes and has been quoted by mainstream media publications for his opinions and expertise.

Having handled & tested hundreds of products there really is very little he does not know about them.

Passionate about business and helping others, Jon has been involved in various online enterprises since the early 2000s.

After spending 12 years in consumer technology, it was in 2014 that he focused his attention on dental health, having experienced first-hand the challenge of choosing a new toothbrush.

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