Yeah. And most the full-body costumes you see at cons right now are for non-human characters that basically *require* having a mask and stuff. Like the big Ryo-Ohki I've seen around a few cons, for example. Where on the other hand, making a mask and all that for a character who's human to begin with is kinda a lot of work.

That, and I think there's also another fundamental difference- kigurumi like that is basically trying to look like a completely animated character, where regular cosplay is often trying to recreate that character in real life.