I haven't exactly been a completionist so someone else can surely give you a more comprehensive (and possibly more accurate) answer, but I'll try to at least tide your curiosity for now.
So, Jade and Cathy and Sage and Quinn and Nicole are all part of a DIK playthrough. We don't know whether Jill and Bella are mutually exclusive yet, but assuming they are, that's two (Chick) routes for them, one for the aforementioned DIK path, one (Chick) for Maya+Josy, and some people are speculating that we'll also have the chance to choose either Maya OR Josy (though in that case you can probably just use the Maya+Josy save until the relevant branch... Probably a Chick path too).
That's all I can think of off the top of my head at least, I'm sure someone else can help cover for any mistakes or oversights.
You know, the idea exists that if you want good answers on the Internet, you should sneak in false facts into your post so that nerds get the urge to go "Umm, no, actually..." and correct you. Not that I did that here, but, you know, it came to mind.
