[verst]

I am not sure what particular performance metric we are discussing here. I can however say that from a gaming standpoint Windows 10 and 11 perform extremely similar. This at least was the case when Windows 11 was first released and I made the switch to Windows 11 at that time. Since then, several CPU vulnerability mitigation updates have come out which reduce performance. If you are most concerned with gaming performance, you can disable many (but not all) of these mitigations. It's unclear whether your comparison includes an equally fully patched Windows 10 with all the appropriate CPU vulnerability mitigations.