We recommend using Balena Etcher to burn the ISO to your USB stick:
We offer three versions of Nobara: Official, GNOME, and KDE.
The only difference between the Official iso and GNOME iso is Official has pre-enabled extensions for a different cosmetic look. Other than the desktop environment (GNOME with extensions vs. GNOME vs. KDE), all three have identical packages. The official ISO is aimed at people who like GNOME’s functionality, but like KDE’s layout. If you prefer to make your own GNOME modifications, I recommend using the GNOME iso, not the Official ISO.