If you have or can get 2 different storage drives, I’d recommend you consider dual booting and only use Windows for the Windows-exclusive apps.
I don’t have a list of sources on me and don’t care to compile one because it won’t change my advice either way, but as someone who sort of follows privacy-related news I’d say I’m fairly positive Windows 11 is worse than Windows 10. Windows 10 was probably worse than previous versions so we can expect this trend to continue into the future.
The Microsoft account requirement is one obvious example. That doesn’t mean Windows 10 was acceptable either and comparing the two in 2025 is kinda pointless now that Windows 10 is about to reach EOL in a few months.
Yes, security updates will typically be preferable even if it comes with more data collection. Especially considering Windows 10 already collects tons of data to begin with. It’s not like you’re comparing Windows to Linux where there’s a notable difference in privacy and security features and you’d have to pick between different pros and cons.