Mike,

We'd be of the impression that at least a part of what you mention is a reference to Sonicare's rating of the brush head that comes with the Diamond Clean as compared to the Easy Clean's ProResults head. Those are the exact numbers (7x vs 2x) that are stated on the Sonicare website for those respective heads.

Both brushes offer Sonicare's best brushing action (31,000 brush strokes/min), although we will concede that users seems to state that they get a better "clean" with Sonicare's higher-end brushes (we'd mainly just contest the 7x vs 2x comparison). Keep in mind that both brushes can utilize the Diamond Clean (7x) brush head.

We're not so convinced with the validity of Sonicare's rating system (7x, 2x, etc..) for heads. We discuss that issue here.

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