>>323964289
Nvidia usually gives a smoother experience as far as frametimings and dropped frames go but it depends on the game and engine used. 
https://babeltechreviews.com/vr-wars-the-rx-6800-xt-vs-the-rtx-3080-15-vr-games-performance-benchmarked/

I think I remember reading that Nvidia is better for visual quality if using Quest 2 via link as well. Something to do with hardware compression being better.