It’s quite rare to see articles that compare Linux and Windows gaming benchmarks so here it is from Computerbase. Translated by Google Translate as the article is originally written in german.
tl;dr
OS: Arch Linux Kernel: Zen Kernel 6.4.8 Mesa: 23.1.5
Average FPS are identical in FHD, while Windows is 4% ahead in WQHD. 1% Low FPS are 16% and 15% higher on Windows respectively.
Raytracing performance isn’t playable, so it is not included in this benchmark.
I’m 50% through it on Linux. It runs great but ever since the last patch after I’ve been playing for about an hour my framerate tanks to the low 30s until I restart the game.
Also the they’ve enable raytracing on AMD GPU’s but it still isn’t enabled on Linux.