[arsfeld]

I used both and even though their purpose is very similar (have an "immutable" system tree that you create and switch into it), the day to day is very different.

Silverblue is still pretty much imperative, you install/remove RPM packages and that's it, you use Flatpak for everything else. NixOS you have to describe your entire system in a programming language. NixOS gives you so much more freedom to do what you want, but you have to work for it, learn a language, learn it's constructs, etc.

I enjoy both though, feels like the right direction to go, you just need to choose how you want to interact with your OS.