The Philips Sonicare DiamondClean 9000 and the DiamondClean Smart 9400 are the two best-selling premium brushes in the Sonicare lineup. They share the same powerful core engine (62,000 movements/min), 4 Brushing Modes, and 3 Intensity Levels.
The key difference that makes the DiamondClean Smart 9400 the superior upgrade is its Advanced Visual Pressure Sensor (a purple light ring) and its App’s Real-Time 3D Mapping for guided brushing—essential smart features the 9000 lacks.
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- Get 66% off (for around £190) Philips Sonicare DiamondClean Prestige 9900 – Sonic Electric Toothbrush with 1x A3 Premium All-in-One Brush Head and Charging Case in Midnight Blue (Model HX9992/12)
- Get 58% off (for around £190) Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9918/89
- Get 59% off (for around £130) Philips Sonicare DiamondClean 9000 Electric Toothbrush, Special Edition, Sonic Toothbrush with App, Pressure Sensor, 4 Brushing Modes, 3 Intensity Levels, Charging Stand, Aquamarine, Model HX9911/89
- Get 65% off (for around £70) Philips Sonicare AdvancedClean Limited Edition Electric Toothbrush – Smart Screen, Pressure Sensor, Brush Head Replacement, 5 Brushing Modes and SmarTimer, Black, Model HX3792/11
Last update on 2025-11-30 at 01:20 / Affiliate links / Images from Amazon Product Advertising API
Key Differences at a Glance: 9000 vs. 9400 Smart
| Feature | DiamondClean 9000 | DiamondClean Smart 9400 |
| Pressure Sensor | No Visible Light. Handle vibrates slightly to alert you to pressure. | Visible Light Ring. Flashes purple for immediate, visual feedback. |
| App Guidance | Basic coaching, progress reports. No 3D Mapping. | Real-Time 3D Mapping (TouchUp feature) to show missed areas. |
| Scrubbing Sensor | No | Yes (Detects scrubbing motion for better technique). |
| Charging Accessory | Standard Charging Base/Puck. | Charging Glass + Standard Charging Base. |
| Plaque Claim (Typical Set) | Up to 10x more than a manual toothbrush. | Up to 20x more than a manual toothbrush. |
| Design/Colors | Comes in multiple colors (e.g., Black, Rose Gold, Aquamarine). | Generally more limited colors (e.g., Black, White, Pink, Silver). |
| Price | £129.98 | £159.99 |
| Check it out | Check it out |
Understanding the Plaque Removal Claims (10x vs. 20x)
The significant difference in performance claims between the 9000 (Up to 10x) and the 9400 (Up to 20x) is mostly a packaging and brush head difference, not a raw power difference in the handle itself. Both handles can achieve the maximum clean by using the latest A3 Premium All-in-One brush head.
Philips Sonicare DiamondClean 9400 Review
The Philips Sonicare DiamondClean Smart 9400 is a sophisticated, top-of-the-line electric toothbrush that moves beyond just cleaning to become a personalized oral hygiene coach. It incorporates multiple sensors and advanced connectivity to deliver a comprehensive and effective cleaning experience.
Here is a deeper look into the key features and technology of the DiamondClean Smart 9400 (Model HX9917/89):
Advanced Smart Sensor Technology & Coaching
The “Smart” in the 9400’s name refers to the advanced sensors built into the handle, which provide real-time feedback both on the brush itself and via the Philips Sonicare app:
- Pressure Sensor (Light Ring): If you apply too much pressure, the light ring at the base of the handle will flash brightly and the handle vibrates slightly. This is a clear visual alert to protect your gums and teeth from scrubbing damage.
- Scrubbing Sensor: The handle can also detect a scrubbing motion (moving the brush back and forth like a manual toothbrush) and guide you to reduce it, promoting the proper “let the brush do the work” sonic technique.
- Location Sensor (In-App): When connected to the app, this sensor tracks the position of the brush inside your mouth, creating a 3D mouth map. This map highlights any spots you may have missed, and the TouchUp feature allows you to go back and quickly cover those areas for 100% coverage.
- Personalized Guidance: The app provides real-time coaching, tracking your progress over time and offering personalized tips to improve your technique.
Supreme Cleaning Performance
The 9400 is among the highest-performing brushes in the Philips lineup, using powerful sonic action:
- Plaque Removal: It is clinically proven to remove up to 20x more plaque than a manual toothbrush.
- Gum Health: It contributes to up to 15x healthier gums (in Clean mode vs. a manual toothbrush).
- Speed: The brush delivers up to 62,000 brush movements per minute—the signature of Philips Sonicare’s fluid action that pulses water and toothpaste between teeth and along the gumline.
BrushSync™ Technology
This intelligent feature ensures you’re always using the optimal settings and a fresh brush head:
- Automatic Mode Pairing: A microchip in the brush head (like the included A3 Premium All-in-One or G3 Gum Care) communicates with the handle, automatically selecting the recommended mode and intensity for that specific head. For example, attaching a Gum Care head will instantly select the Gum Health mode.
- Replacement Reminder: The toothbrush tracks how long and how hard you’ve brushed with a specific head and alerts you when it’s time to replace it (after three months).
Premium Charging & Accessories
The 9400 is designed for both home luxury and travel convenience:
- Charging Glass: The sleek Charging Glass allows you to simply place the handle into the glass (which sits on a charging base) for inductive charging—a stylish, stable, and convenient countertop solution that also doubles as a rinsing cup.
- USB Charging Travel Case: The included premium travel case allows you to charge the handle while it is stored, simply by plugging the case into a USB port (or wall socket via the included 2-pin plug). This provides up to 14 days of battery life for travel.
The DiamondClean Smart 9400 is an ideal choice for users who want the absolute best cleaning metrics and are committed to using the accompanying app to achieve a dentist-level clean through continuous feedback and guidance.
Which is better, Philips Sonicare 9000 or 9400 DiamondClean
The Philips Sonicare DiamondClean Smart 9400 is better and more advanced than the DiamondClean 9000, but it also comes at a higher price.
Both are premium, effective brushes, but the 9400 offers superior cleaning metrics and more premium features.
Here is a breakdown of why the 9400 is generally considered “better,” followed by reasons why the 9000 might be the “smarter” buy for some users:
Why the DiamondClean Smart 9400 is Better (The Upgrade)
The 9400 justifies its higher original price compared to the 9000 by offering key advantages in performance and accessories:
- Superior Cleaning Performance: The 9400 boasts significantly better clinical claims:
- Plaque Removal: Up to 20x more effective vs. the 9000’s up to 10x more effective.
- Gum Health: Up to 15x healthier gums vs. the 9000’s general gum health mode.
- Enhanced Pressure Feedback: The 9400 has a dedicated Light Ring Pressure Sensor that flashes vividly if you press too hard. The 9000 only uses a slight handle pulse as its pressure indicator, which is less obvious during brushing.
- Premium Charging Accessories: The 9400 includes the full suite of luxury accessories:
- The elegant Charging Glass for countertop use.
- The USB Charging Travel Case for convenient charging on the go.
Why the DiamondClean 9000 Might Be the Smarter Buy (The Value)
The 9000 is still a powerhouse and offers better value if you don’t need the maximum claims:
- Excellent Core Cleaning: Both brushes have the same 4 modes (Clean, White+, Gum Health, Deep Clean+) and 3 intensity levels, driven by the same 62,000 movements per minute sonic technology. The 9000 still delivers an exceptional clean.
- App & Timer Features are Shared: Both models feature BrushSync™ (for replacement reminders and mode pairing), the SmarTimer, QuadPacer, and connectivity to the Philips Sonicare App for coaching and progress reports.
Final Verdict: Which One Should You Choose?
Choose the DiamondClean Smart 9400 (The Premium Upgrade)
- You want the most advanced app features, such as real-time 3D mapping.
- You want the ability to see if you’re pressing too hard with the visible pressure sensor light (purple light ring).
- You want the full suite of luxury accessories: the elegant Charging Glass and USB Travel Case.
Choose the DiamondClean 9000 (The Best Value Clean)
- You want a high-quality smart toothbrush that can still track your brushing habits, manage brush head replacements (BrushSync), and has similar core features for a lower price.
- You don’t require the advanced 3D App Mapping or the visible light ring for pressure feedback.
FAQ)
What is the difference between Sonicare 9000 and 9400?
The primary difference is the 9400 is a “Smart” brush and the 9000 is not. The 9400 features a visible pressure sensor light ring (flashing purple) and real-time 3D mapping in the app to show missed spots. The 9000 only alerts you to pressure via a handle pulse and provides basic progress tracking.
What is the difference between Sonicare 9000 and 9900?
The 9900 Prestige is the absolute flagship model, adding SenseIQ Technology. This technology not only senses when you brush too hard (like the 9400) but automatically adapts and reduces the brush intensity in real-time, giving it an extra level of protection and personalization. The 9900 also generally has a sleeker design and a premium USB-C Charging Travel Case.
Is DiamondClean 9000 worth it?
The DiamondClean 9000 is absolutely worth it if you are looking for a top-tier sonic cleaning experience without paying for the most advanced tracking features. It has the same core sonic power, 4 modes, 3 intensities, BrushSync technology, and a premium design, making it the best balance of features and value in the high-end DiamondClean series.
What is the difference between Sonicare 9000 and 7900?
The DiamondClean 9000 is the more premium model. The key differences compared to the ExpertClean 7900 (or similar 7100):
- Modes: 9000 has 4 modes (including Deep Clean+) vs. 7900’s 3 modes.
- Charging: 9000 includes the more luxurious Charging Glass and a premium USB charging travel case.
- Design: The 9000 has a sleeker, more polished aesthetic and often comes in premium colors.
What is the difference between Sonicare 9000 and 5300?
The difference here is significant. The DiamondClean 9000 is a flagship model with advanced features, while the 5300 is a mid-range model (part of the ProtectiveClean Series).
| Feature | DiamondClean 9000 | ProtectiveClean 5300 |
| Modes/Intensities | 4 Modes / 3 Intensities | 1 Mode / 2 Intensities |
| Connectivity | Bluetooth App for coaching/tracking. | No Bluetooth/App connectivity. |
| Pressure Sensor | Vibrates the handle to alert you. | Vibrates the handle to alert you. |
| Accessories | USB Charging Travel Case + Charger Base. | Simple Charging Base only. |
The 9000 offers far greater customization and tracking, while the 5300 provides the essential sonic cleaning power and a basic pressure sensor at a much lower cost.
Last update on 2025-11-30 at 01:20 / Affiliate links / Images from Amazon Product Advertising API
