Well, I'm also considering Mousey's behavior as well. He seems to send more straight forward notes while Kid's are, on occasion, much more elaborate. I don't quite beleive I've ever seen Mousey return his heist, which is also something I will never understand. Why steal if only to return it? Though I will admit I would rather attend a Kid heist than one of Mousey's.

It's a strange schism of the breed, really.