Sometimes I find the Proton version of a game working better than native. For example Pathfinder Kingmaker which has some kind of interface bug that makes it difficulty to progress after a certain point because the kingdom management interface doesn’t work correctly. Loaded proton version, no bug and the performance is waaaaay better. Smooth gameplay.

I’m guessing here that native games are often linked to some SDL version or something similar and might not work well with a considerable newer system.