Aside from being based on Fedora 39 now, KDE is now the official desktop environment replacing GNOME. The reasons why are in the article.
The GNOME version of Nobara still exists, but it’s going to be the vanilla version shipped without any extensions (probably because many of them broke after moving to Fedora 39)
Support and reliability
IDK , Nobara is really stable. The main difference for me was that it comes with all the AV codecs you could need, and a few tweaks for gaming. Saved me a lot of time in the end.
These are the reasons why I would consider installing Nobara over Fedora…