Back when I was using Arch Linux and still did a lot of desktop-experimenting, I tried linux-zen out of curiosity.

I did not do any benchmarks, as I wanted to know if I can notice anything. I did not feel any difference. Maybe it was because I did not play the most pc-stressing games, maybe there was no difference because my hardware was relatively new, maybe it was because most of my games were more GPU-limited then CPU-limited, I do not know. All I can say is, there was no difference for me to notice in my gaming sessions, so I switched back to the default kernel.

Currently using Fedora Workstation 42 and linux 6.14.5, still happy with default kernel.