Logitech MX Master 3S vs Logitech MX Master 4

The MX Master 3S has a great electromagnetic scroll wheel with hyperfast and ratchet modes — it's genuinely excellent. But the MX Master 4's haptic feedback wheel adds adjustable resistance you can feel, making precision scrolling through long documents or timelines a tactile experience rather than a guessing game. It sounds like a gimmick until you use it for a week and then go back to the 3S.

The MX Master 4 adds a physical Action Ring around the scroll wheel and a redesigned gesture button — these aren't cosmetic changes. The Action Ring lets you map rotational controls to things like volume, zoom level, or brush size in creative apps, while the gesture button unlocks directional swipe shortcuts. For anyone doing creative or heavy knowledge work, this replaces multiple keyboard shortcuts with muscle memory on the mouse itself.

The MX Master 3S runs $100-120 while the MX Master 4 is $120-130 — that's roughly a $20 difference at street price. For a mouse you'll use 8 hours a day for the next 3-5 years, $20 is noise. The 3S is not a budget consolation prize, but if you're already spending $100, spending $120 for a legitimately better product is the obvious call.

The MX Master 3S has years of firmware updates, community-tested Logi Options+ profiles, and a massive library of user configurations floating around Reddit and productivity forums. The MX Master 4 is newer, which means its software ecosystem is still maturing. For most users this won't matter, but if you rely on niche app integrations or have a highly customized setup, the 3S's maturity is a real advantage.