Oral‑B iO Series 9 outperforms the DiamondClean in plaque‑removal efficiency and adds AI‑driven pressure feedback, giving it a clear edge for deep‑clean enthusiasts. Philips Sonicare DiamondClean scores higher on design elegance and offers a polishing cup, making it a solid choice for users who prioritize aesthetics and a gentler sonic feel. Overall, the iO Series 9’s superior cleaning performa...
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