Oral-B iO Series 9 vs. Genius X vs. Sonicare 9900 Overview

>>Oral-B iO Series 9 Review

User reviews:4.6/5.0

In the world of electric toothbrushes, Oral B is one of the biggest brands alongside Philips Sonicare. The Oral B-io Series 9 is one of the brand’s most high-tech models, with plenty of smart features and an incredible AI-powered app.

The Oral-B iO Series 9 is a pleasure to use, quietly gliding across each tooth to remove tough plaque, and offering genuinely useful real-time feedback to help ensure you do as thorough a job as possible. You'll get the most out of this brush if you use Oral-B's companion app to monitor how you're cleaning each surface, but the brush itself gives you plenty of guidance if you don't have time to check your phone. This all comes at a cost, and the iO Series 9 is one of the priciest electric toothbrushes around. It has dropped in price substantially since launch though, and can help you develop better habits and technique that should serve you well for years to come.

Charging this toothbrush is also incredibly easy: all you need to do is plug the charger in and place the toothbrush handle on the magnetic charger base. The battery level is indicated on the screen, so you don’t have to wait for longer than it takes to fully charge the battery .

Key Features

• 2 week + battery life 

• Comes with a charging portable case 

• Comes with one replaceable brush head 

• Comes in pink, white or black 

• 7 brushing modes 

• AI-powered app 

• Built-in timer 

• Built-in pressure sensor 

• 2-year warranty

Key Specs

Advantages and Disadvantages

 What's in the box?

• Oral-B iO Series 9 iO M9.4B2.2A

• 4 x iO Ultimate Clean brush head

• Power2Go charging travel case

• Charging stand

• Battery

Where to Buy Oral-B iO Series 9 Cheapest?

• Oral-B:$299.99 (up to 8% cashback)

• Walmart:$299.97   (up to 4% cashback)

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Is the Oral-B iO Series 9 Worth it?

Performance-wise, the iO Series 9 is a winner. As far as I'm concerned, it's earned its stars right there.And if you've been meaning to take your dental care in hand, its feedback, via both handle and app, will help you to remember to brush properly and well.

>>Oral-B Genius X Review

User reviews:4.8/5.0

The Oral B Genius X is an impressively high-tech toothbrush that can improve your technique, but sonic toothbrush lovers may not enjoy the higher volume.

The Oral-B app adds some excellent tools to help improve your brushing technique and ensure you don't miss a spot (it tracks the brush's position in your mouth in real time with surprising accuracy), but the Genius X also delivers a thorough clean if you prefer not to connect it to your phone. It's perhaps not the best brush if you have particularly sensitive gums, as the cleaning action is pretty vigorous and it takes a quite a lot of pressure to activate the warning sensor, but it's an otherwise great all-rounder. Its cleverly designed charging case is a highlight too, and gives regular travellers extra options for keeping their brush powered up.

The Oral B Genius X also includes a host of useful features, such as a pressure sensor, a two-minute timer, and a 3-second pulse reminder to switch position, plus a range of stylish colors to choose from, including rose gold and sleek black. It also offers users the ability to customize their toothbrushes further, with a fun color-changing ring at the top of the handset.

Key Features

• 2 minute timer including quadpacer

• 360 degree Smart Ring (LED light ring)

• Charging travel case

• Bluetooth connectivity

• Small round brush head with Oral-B 3D movement cleaning system (Oscillating-Rotating-Pulsating)

• 6 cleaning modes (Daily Clean, Pro Clean, Sensitive, Whitening, Gum Care, Tongue Clean)

• Built-in rechargeable battery with 14 day battery life

• Visible gum pressure sensor

Key Specs

Advantages and Disadvantages

What's in the box?

Please note. The Genius X in the USA is also known as the 10,000. The model number 10,000 is used interchangeably with the X.

• Sakura Pink colored brush handle

• 2 x white colored CrossAction brush heads

• 1 x white colored 3D White brush head

• 2 x white colored FlossAction brush heads

• 2 x white colored Pro GumCare brush heads

• White colored charging travel case with pink and grey pattern

• White colored charging stand (with detachable power cable)

• White colored power cord (fits travel case & charging stand)

• User manual/documentation

Where to Buy  Oral-B Genius X  Cheapest?

• Oral-B:$179.99 (up to 8% cashback)

• Walgreens:$219.99 (up to 4% cashback)

Is the Oral-B Genius X Worth it?

If you’re looking to up your brushing game from a standard electrical toothbrush, then the Oral B Genius X could be the right brush for you. Users who have been advised to improve their brushing technique by their dental hygienist will enjoy the unique coaching programs available on the app, while data junkies will love tracking their dental habits and patterns over time. 

>>Philips Sonicare 9900 Prestige Review

User reviews:4.6/5.0

The Philips Sonicare 9900 Prestige is an absolutely top-end electric toothbrush, and it shows. It's smart and sleek, and even comes with an executive-looking leather-effect travel case that keeps it charged when you're away from home. It's slim and light in the hand, designed to stay as clean as possible, and its compact all-purpose brush head avoids the need to switch between different designs for sensitive and intense brushing.

The downside of that minimalist design is the lack of controls on the handle, which means you'll have to delve into the Sonicare app to make adjustments to the settings. That's not a problem if you know exactly what type of brushing experience you like, and are happy to invest a little time getting it just so, but if you're in a hurry you can't pick a mode on the fly as you can with the Philips Sonicare DiamondClean 9000.

And here are 3 variants of the Sonicare 9900 Prestige.The difference is the color of the brush handle and travel case.From a feature, performance and technical point of view they are all the same.

Key Features

• 5 cleaning modes

• Built-in timer and pacer

• Visible pressure sensor

• Visible scrubbing sensor

• 14+ day battery life

• Automatic power off

• Brush head replacement reminder system

• Real-time tracking of the brush head position

Key Specs

Advantages and Disadvantages

What’s in the box?

• 1x Sonicare 9900 Prestige

• 1x A3 Premium All-in-One

• 1x Prestige USB charging case

• 1x USB-C charger cable

• 1x Charger base

Where to Buy Sonicare 9900 Cheapest?

• Philips:$379.96 (up to 7% cashback)

• Bestbuy:$379.99   (up to 0.5% cashback)

Is the Philips Sonicare 9000 Worth it?

Overall this is a good toothbrush with lots of features, and many of them don't need the app to perform. The brush is easy to use and get set up, it stores data so you don't need to sync every day, it's comfortable and the brush head is soft and suave.

Oral-B iO Series 9 vs. Genius X vs. Sonicare 9900:Where Are the Differences?

1.Handle design/colors

• The Oral-B iO Series 9 is available in 3 color options (white alabaster, black onyx & rose quartz).And it has an interactive color OLED display in the brush handle,with  an LED light ring that can be lit a number of different colors.

• The  Oral-B Genius X is available in 3 color options (black, white, & orchid purple). And it hascleaning mode icons on the brush handle. With an LED light ring that can be lit a number of different colors.

• The Sonicare 9900 Prestige is available in 3 color options (champagne, midnight blue & pink).

2.Cleaning/brushing action

• The Oral-B iO Series 9 has 7 cleaning modes (daily clean, sensitive, super sensitive, intense, whiten, gum care, and tongue clean). The iO’s cleaning modes can be changed from the handle, whereas the 9900’s have to be changed via the app.

• The  Oral-B Genius X has 6 cleaning modes (daily clean, gum care, sensitive, whitening, pro clean &tongue clean). The Genius X cleaning modes can be changed from the handle, whereas the 9900’s have to be changed via the app.

• The Sonicare 9900 Prestige  with 5 cleaning modes (clean, white+, deep clean+, gum health & sensitive). The 9900 offers 3 different intensities to the cleaning modes, low, medium, and high. 

3.Brush heads

• The Oral-B iO Series 9  comes with 4 brush heads (4 x Ultimate Clean).
  

• The  Oral-B Genius X comes with 3 brush heads (1 x CrossAction, 1 x 3D White & 1 x FlossAction).

• The Sonicare 9900 Prestige comes with 1 brush head (1 x A3 Premium All-in-One).

4.Pressure sensor

• The Oral-B iO Series 9  has an LED ring at the top of the brush handle that lights up red when too much pressure is applied. 

• The  Oral-B Genius X has an LED ring at the top of the brush handle that lights up red when too much pressure is applied. 

• The Sonicare 9900 Prestige has an LED ring on the base of the handle that illuminates purple when too much pressure is applied. 
  

5.Battery

All brushes have a claimed 2 week battery life.

• The Oral-B iO Series 9 gives more battery feedback on the handle via the OLED display.  The Prestige has an exact percentage (%) shown within the smartphone app.
  

• The Prestige achieved around 4 weeks in use compared to the 16 days of the Oral-B Genius X 

• The Sonicare 9900 Prestige achieved around 4 weeks in use compared to the 16 days of the Genius.And the Prestige offers an exact percentage (%) shown within the smartphone app.

6.Bluetooth technology

The Oral-B app tracks more tooth surfaces than the Prestige.It appears to take longer than 2 minutes in the Oral-B app to successfully clean all tooth surfaces.

The Sonicare app feels more comprehensive, educational and useful.

7.Accessories & box contents

• The Oral-B iO Series 9 has a magnetic charging stand that can recharge the brush in around 3 hours.

• The  Oral-B Genius X  takes up to 12 hours to charge via the charging stand.

• The Sonicare 9900 Prestige takes up to 16 hours to fully charge via the USB charging stand.

8.Travel case

• The Sonicare 9900 Prestige travel case charges via a USB Type C connector, rather than the bulky proprietary power adapter of the Oral-B iO Series 9.

• The  Oral-B Genius X  case has a USB port on it for charging other devices. And it holds 2 brush heads as opposed to the 1 of the Prestige.

• The 9900’s travel case is slimmer and more stylish than the Genius.

Oral-B iO Series 9 vs. Genius X vs. Sonicare 9900 Full Comparison Chart

The following table lists the key differences betweenOral-B iO Series 9, Genius X and Sonicare 9900.

Oral-B iO Series 9 vs. Genius X vs. Sonicare 9900:Which is Right for You?

Buy Oral-B iO Series 9 if...

• You prefer  high-tech display 

The Oral B-io Series 9 is a premium product. It looks sleek and high-tech with its color display and comes with a nifty charging case you can take on the go. 

• You need customized advice

iO Series 9is the incredible AI-powered app it comes with. This app gives you tons of information and allows you to track your brushing in real-time, ensuring you don’t miss a spot. Based on your past brushing, you get customized advice to improve your brushing technique.

• You’re really curious about how you brush and want to improve your technique

This toothbrush is really helpful. It also helps with motivation to brush as it ‘gamifies’ the process and rewards you for regular and in-depth brushing. 

Buy Oral-B Genius X if...

• You're a frequent traveller

The brush's charging case is excellent, with room for two heads rather than just one, and a choice of charging options. It's not as sleek as the cases of some higher-end brushes, but is better designed in many ways.

• You're on the fence about smart toothbrushes

The Oral-B Genius X doesn't rely on its app for any of its key features (such as its pressure sensor), so it's entirely up to you whether you use its Bluetooth function or not. If you're undecided, it gives you the best of both worlds.

• The iO Series 9 is too expensive

The Genius X offers much of the same functionality as the iO Series 9, but in a slightly less fancy package and with a more modest price tag.

Buy Sonicare 9900 Prestige if...

• You're a frequent traveller

The USB-C chargeable case means you can take the Sonicare 9900 Prestige on the road for weeks, and it's designed to stay as clean as possible on your journeys.

• You want to perfect your brushing

The real-time feedback will help you develop better technique that'll serve you well long-term, even on days when you don't want to open the app.

• Style matters

Let's be honest, style one of this brush's key selling points. Its sleek design is timeless, and will look the part in any bathroom.

Which one would we choose?

1st choice: Philips Sonicare 9900 Prestige
2nd choice: Oral-B iO Series 9 

3rd choice: Oral-B Genius X

Conclusion:

The 3 brushes do the same job.  They all clean the teeth very well and all offer more features than you need.

• But, when you consider all the features on offer, the Sonicare 9900 Prestige is the more compelling option.  It is a more complete offering that feels a little more current and considerate of the user.

• Whilst both Oral-B iO Series 9 and Genius X clean the teeth very well, the iO Series 9  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.

• However, the Genius X is the much better value option and isn’t far behind the Sonicare as an overall package.
  

Related Read:

Oral-B Pro 1000 vs. Sonicare 4100: Ultimate Comparison & Verdict 2025

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Oral-B iO vs. Genius vs. Smart vs. Pro: Differences/Specs/Reviews 2025

Sonicare vs. Oral-B vs. Quip vs. Waterpik: Which Makes the Best Electric Toothbrush?

Oral-B iO Series 6 vs. 7 vs. 8 vs. 9 Comparison: Differences/Specs/Reviews 2025

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