1. There is a huge divide in fandom, twitch viewers doesn't watch youtube vtuber and youtube vtuber fan doesn't watch twitch vtuber.
2. The divide also shows in the vtubers themselves, while most youtube vtuber tries to be as close to being a hololive/nijisanji member/be an idol. Twitch vtubers usually doesn't and some of them aren't afraid to stream with their real faces/real body randomly, engage in horny shit and some of them literally do porn work (Projekt Melody/CottontailVA)
3. There are more varieties in twitch and they are not strictly live2D models, some example
Zentreya (dont know what she uses, uses a voice changer),
CodeMiko (Unreal engine),
Filian (who uses VRchat only and really good at it) and the rising star of this year is
Neuro-sama (an actual AI programmed by a guy - the turtle on her head),
4. There are alot more independents on twitch than youtube.
Notable independents
Shxtou, probs the most
idol like vtuber on twitch (male), who farms girl audience and does singing.
Bao - mostly known for being a horny furry masochist vtuber?
Shylily - idk why all dolphin twitch tubers are horny furry masochist, but so does she
Chibidoki - very big head, funny, chaotic
Onigiri - mainly does cooking with a really nice setup.
5. Vshojo is the 3rd biggest corpos in the west, farming twitch watchers (only behind HoloEN and NijiEN). Their current biggest Twitch chuuba is Ironmouse streams alot, literally disabled and is a really good
singer.
Henya is just straight up a reincarnated youtube vtuber
6. Unlike hololive walled garden aproach, twitch tubers collab with each other alot, corpo or noncorpo
7. Wont name any small ones (more like i dont watch any and you asked for representatives). There are also alot of normal streamers who get live2d models just for the sake of it. Won't name anyone because fuck them.
8. I used random chinese subbed clips on youtube, but you probs can find better clips on bilibili. My personal ranking goes Chibi >= Henya dont care about the rest.
Edit: ah fuck now my youtube feed is full of chinese shit.