Game rip rules of thumb:

GH Rips have the following format and are typically all stereo stems:
4 Drum Stems (Kick, Snare, Toms, Cymbals)
1 Bass Stem
1 Guitar Stem
1 Vocals Stem (incl BG Vocals)
1 "Other"

RB Rips have the following format and can be a mix of stereo and mono stems:
1 - 3 Drum Stems (Full Kit / Kick + Kit / Kick + Snare + Kit)
1 Bass Stem
1 Guitar Stem
(RB3 Only) 1 Keys Stem
1 Vocals Stem (no BG VOX if before 2010; otherwise including BG Vox)
1 "Other"

All RB songs will be on this list: https://rbdb.online/
Everything else is probably a GH song.

Anything that you get in "ogg" format is a re-encode, you are dealing with generation loss.
Some RB stems in "mogg" format are not re-encoded, if they are from before 2009.
Every GH stem in "mogg" format is a re-encode.