The very same ones when one compares Fedora Workstation to Fedora Silverblue. Which mostly come down to Bazzite offering more stability, improved security, reproducibility, atomic updates and a pinch of declarativity^[1]^ at the expense of relearning a thing or two and actually being limited in some (rather niche) actions that are currently not supported on Silverblue (and thus -by extension- Bazzite). Chances are rather slim that the average Nobara-user would delve into any of those unsupported actions. So if you ever happen to stumble upon something you're not able to do/perfom on Silverblue/Bazzite/uBlue then it's safe to assume that you're not approaching it correctly and that a different approach would have resulted in the desired outcome.

1. Regular Silverblue is not very declarative, if at all. However, the toolkit that uBlue offers -and which is used by Bazzite to create its image- enables one to have some degree of declarativity. It's by no means comparable to the likes of NixOS or Guix, but it's only going to get better from here.