Bazzite -> Community & Docs -> FAQ
https://docs.bazzite.gg/General/FAQ/#what-is-the-difference-...
> Bazzite originally was developed for the Steam Deck targeting users who used their Steam Deck as their primary PC. Bazzite is a collection of custom Fedora Atomic Desktop images built with Universal Blue's tooling (with the power of OCI) as opposed to using an Arch Linux base with A/B updates utilizing RAUC. The main advantages of Bazzite versus SteamOS is receiving system packages in updates at a much faster rate and a choice of an alternative desktop environment.
It is a Linux distribution, that aims to compete with Valve's SteamOS Linux distribution supplied with the Steam Deck (which itself is based on Arch Linux). Like SteamOS, it can be used on a regular desktop PC as well... but they are mainly aiming to run on the Steam Deck:
https://docs.bazzite.gg/General/FAQ/#is-this-another-fringe-...
> The purpose of Bazzite is to be Fedora Linux, but provide a great gaming experience out of the box while also being an alternative operating system for the Steam Deck and other handheld devices.
Effectively they have taken Fedora Linux, and added to it the same sort of setup and programs that you get out-of-the-box with SteamOS as well.
For the most part, it is not the people offering Bazzite that are doing the hard job of providing security updates, etc., they are hoping that being based on Fedora will provide that assurance. They merely supply and configure some extras on top (e.g. the Steam client software)