The Philips Sonicare C1 ProResults and C2 Optimal Plaque Control are both designed for daily plaque removal, but they belong to different tiers: the C1 is the entry-level option, while the C2 is the smart, mid-range choice. The main difference is the BrushSync chip and a substantial difference in cleaning power. The C2 is demonstrably more effective, removing up to 7x more plaque than a manual toothbrush, significantly more than the C1’s 2x claim. Here, we help you break down the differences and similarities to choose the best head for your needs and budget.
Last update on 2025-11-26 at 19:50 / Affiliate links / Images from Amazon Product Advertising API
Quick-View Comparison: Sonicare C1 vs C2 Specs
| Feature | Philips Sonicare C1 (ProResults) | Philips Sonicare C2 Optimal Plaque Control | Key Difference |
| Plaque Removal Claim | 2X more plaque than a manual brush. | 7X more plaque than a manual brush. | C2 is 3.5x more effective. |
| Smart Technology | No BrushSync Chip (Requires manual tracking). | BrushSync Chip (Auto mode-pairing & usage-based reminder). | C2 is smart-enabled. |
| Bristle Design | Contoured profile for comfort and basic plaque removal. | Uniquely curved shape with soft, firmly packed bristles for superior reach. | C2 has a more effective design. |
| Cost | Less expensive (Best for budget). | More expensive (Best for value). | Price vs. Performance. |
| Packaging | Pack of 4 | Pack of 4 | |
| £17.39 | £21.99 | ||
| Check it out! | Check it out! |
Key Differences Explained
1. Plaque Removal Effectiveness (The Value Proposition)
The greatest difference is in the cleaning claims: the C2 Optimal Plaque Control removes 7x more plaque than a manual brush, making it significantly more effective than the C1 ProResults, which removes only 2x more plaque. For users prioritizing dental health, the C2 offers a clear performance advantage.
2. Smart Chip Technology (BrushSync)
The C2 is the entry point for Philips’ smart features:
- C2 Optimal Plaque Control: Fitted with a BrushSync chip. When used with a compatible handle (like ProtectiveClean or ExpertClean), this chip automatically selects the correct cleaning mode and uses internal sensors to accurately remind you when the head needs replacement (based on usage and pressure, not just time).
- C1 ProResults: This head lacks the chip. Users must rely on the fading blue bristles and manually tracking the three-month replacement cycle.
3. Bristle and Design
Both heads feature a contoured profile, but the C2 utilizes a uniquely curved curvature and a more dense packing of bristles. This design is specifically engineered to improve access to the tooth surfaces at the rear of the mouth and along the gum line, contributing to its higher plaque removal claim.
Similarities: What They Share
- Plaque Focus: Both are part of the C-series and are primarily designed for daily plaque removal.
- Compatibility: Both the C1 and C2 are interchangeable and compatible with almost all Philips Sonicare click-on rechargeable toothbrush handles (excluding older screw-on and battery-powered models).
- Replacement Reminder: Both heads feature blue indicator bristles that fade to white, visually signaling that the head is worn out and requires replacement.
FAQ: Sonicare Brush Head Naming Explained
1. What does C1, C2, and C3 mean on a Sonicare toothbrush?
The letter “C” stands for Plaque Control/Defence. The number indicates the level of advancement and features within that family, moving from basic to premium:
- C1 (SimplyClean / ProResults): The most basic head for general plaque removal. It lacks the smart chip and has the lowest plaque removal claim (2X more than a manual brush).
- C2 (Optimal Plaque Control / Defence): The mid-tier option. It includes the BrushSync chip (a key upgrade from C1) and has a significantly higher plaque removal claim (7X more than a manual brush).
- C3 (Premium Plaque Defence): The highest-tier option. It features the most advanced bristle design, premium materials, the BrushSync chip, and the highest plaque removal claim (10X more than a manual brush).
2. What is the difference between Sonicare C1 and C3?
The difference is substantial and centers on performance and smart features. The C3 is up to 5 times more effective at plaque removal and includes the BrushSync chip, premium materials, and flexible sides, making it superior for dental health compared to the C1’s basic, budget-friendly design.
3. Are C2 and C3 Sonicare heads interchangeable?
Yes, absolutely. All modern Philips Sonicare click-on brush heads are compatible and interchangeable with all modern Philips Sonicare rechargeable toothbrush handles (excluding the older screw-on and battery-powered models). You can easily switch between a C2 head and a C3 head on the same handle.
4. Sonicare C1 vs W2: What is the difference?
This is a difference in primary goal: Plaque vs. Whitening.
- C1 (Plaque Defence): Primary focus is basic plaque removal (2X more than manual).
- W2 (Optimal White): Primary focus is stain removal for whiter teeth in one week. While it is designed for whitening, its plaque removal claim (7X more than a manual brush) is significantly better than the C1’s.
Final Verdict: Which Head is Best for You?
- Choose the C2 Optimal Plaque Control if: You own a smart Sonicare handle and want to leverage the BrushSync smart features. More importantly, choose the C2 if you prioritize optimal cleaning performance, as it removes 7X more plaque.
- Choose the C1 ProResults if: You are strictly on a budget and prioritize the lowest upfront cost per head. The C1 provides a basic, effective clean, but you must accept the lower 2X plaque removal claim and the lack of smart features.
