Reposting:
https://files.catbox.moe/qqsib8.mp4Many songs have different instruments, probably due to them using ones from the DPPt sound bank.
Most are basically the same besides that, and I have limited space to record, so I only recorded the ones that had different melodies/significant changes.
1022 SEQ_GS_C_KIKYOU - more reverb, part near the end is VERY different from the final
1050 SEQ_GS_R_1_26 - different backing melody/harmony/whatever
1053 SEQ_GS_GYM - higher pitch/backing at the beginning, louder drums like original GSC
1077 SEQ_GS_E_RIVAL1 - more reverb, lower pitch, faster tempo
1078 SEQ_GS_E_RIVAL2 - more reverb, lower pitch, faster tempo
1082 SEQ_GS_SENKYO - much shorter than the final, different pitch, clearly unfinished
1114 SEQ_GS_VS_TRAINER_KANTO - neat how unfinished it is
1004 SEQ_GS_TITLE - basic New Bark Town theme; serves as a placeholder for many songs (I show some at the end)
1005 SEQ_GS_TITLE01 - basic Pokemon theme for title screen, harmony sounds a bit like Dire Dire Docks. Fitting since Luigia's underwater.
fun facts:
No "8 bit" GB-esque song versions (sound bank doesn't even exist)
Ho-Oh/Luigia themes not in yet.
Event-related songs Spiky-Eared Pichu, Sinjoh Ruins, Arceus Battle/Event aren't in.
**super fun fact: Arceus' theme in DPPt is titled SEQ_AUS which makes sense now**
Raikou/Entei share a theme, only Suicune's is just slightly different, but not significantly from them nor the final.
All the DPPt songs are in the same .sdat unlike in the final, and seemingly all have improper instruments (similar reason to why not GB-esque songs: sound bank is different).
1060 SEQ_GS_POKECOMMUNITY isn't in the final; FUCK Pokecommunity forum FAGGOTS
Also here is the HGSS debug character selection screen. I looked quickly and didn't see any HGSS maps implemented.