Sirius sounds terrible imho. Whatever compression scheme they use reminds me of ancient low bitrate mp3 files. It's fine for talk radio (yuck) or podcast style programs but a non-starter for music in my opinion.
I would take any version of Qobuz (or Tidal, or Apple Music) over Sirius. Even the worst connection which would be lossy Bluetooth should still be superior. Apple Carplay or Android Audio is another step up even when using a wireless version (it uses wifi instead of lossy bluetooth to send the signal). Using a cable to an aux jack is good too, again much better than Sirius.
Obviously the convenience factor is important. Carplay and Android Audio do a great job I think. So use one of those if you can.