That's basically it, just easier. SteamOS is like Ubuntu, comes with bunch of stuff integrated and tested together for a easier end-user experience, but you cou

That's basically it, just easier. SteamOS is like Ubuntu, comes with bunch of stuff integrated and tested together for a easier end-user experience, but you could build your own Ubuntu, starting with a base Debian install. Same with SteamOS with Arch (or Manjaro which I think is what they actually use?)