Hard glass mousepads wear down PTFE feet faster.

Yes. The tempered hardness of glass directly affects how quickly PTFE (polytetrafluoroethylene, the usual white plastic) feet wear down. Harder glass is smoother but also more abrasive at a microscopic level — think of it like a very fine sandpaper. PTFE is soft, so it sacrifices itself to glide smoothly. On a standard glass pad, you’ll start seeing wear marks in weeks. On a super-hard, ultra-smooth tempered glass pad, it’s still happening, just maybe a little slower because there are fewer microscopic peaks to rip at the PTFE.

Ceramic feet are much harder than PTFE — closer to glass in hardness. They don’t wear down anywhere near as fast. The tradeoff is that ceramic can feel scratchier and sometimes louder on glass, because you’re grinding two hard surfaces together. But if you want the pad to outlast your mouse, ceramic is the way to go.

Bottom line: Glass pads eat PTFE for breakfast. Ceramic feet will last, but you might not like the feel.