Drag Queen or Female Impersonator

"Are you a drag queen or a female impersonator?" The question, as posed by Mimi on RuPaul's Drag Race, made me think about the difference between the two. A drag queen, as answered by Mimi, has a bit of camp involved whereas a female impersonator is all about emulating the essence of woman. I'm sure some might argue, but her rationale made sense to me.