Having played both, Star Rail is just different. It takes a "quality over quantity" approach, so the content it has is better, but there's not much of it. There's maybe 20-30h of game in there right now, if you do everything. Genshin's more like 200h.

I don't think Lemmy's big enough for niche communities like a SMT specific one.

FYI, it's a remake of base P3, so no FES or Portable content. Knowing Atlus, that will come in P3RR a year later and be exclusive to iOS.