The Oral-B iO Series 9 wins for users seeking guided brushing via its 7 Smart Modes and AI 3D Teeth Tracking per the grounded facts, while the Colgate 360 Advanced Manual Toothbrush excels in affordability and includes a cheek and tongue cleaner for bacteria removal. The Colgate provides spiral polishing bristles for stain removal in soft or medium options without needing power or apps. This is...