Logitech MX Master 4 vs Logitech MX Master 3S

Both are the same family of ergonomic productivity mouse, so the choice comes down to how much you want the newest extras. The MX Master 4 adds haptic feedback and an extra programmable button, and owners praise its comfort, scroll wheel and battery life, though some find it heavy and awkward in small hands. The MX Master 3S is the safer, better-reviewed pick: quiet clicks, 8K optical tracking on glass, 70-day battery and a huge base of satisfied owners. Buy the 4 for the haptics and extra control; buy the 3S for proven reliability and a lower-risk fit.

• Choose the MX Master 4 if you want the newest MX Master with customizable haptic feedback and an extra programmable button, and your hands are medium to large.
• Choose the MX Master 3S if you want the proven, widely praised version with quiet clicks, glass tracking and a long track record of owner satisfaction.