The Philips Sonicare ProtectiveClean 6100 outperforms the Waterpik Sensonic Professional in plaque removal efficiency (31,000 vs 30,000 strokes/min per Consumer Reports) and offers advanced pressure‑sensor feedback, while Waterpik wins on price and quieter operation (per CNET). However, the Sonicare’s BrushSync technology and longer‑lasting motor give it a clear edge for gum‑health enthusiasts....