What is the difference in pitbull bloodlines?

I can't answer your entire question. but i know that in reference to what the difference is between an American pit bull and a Staffordshire is. the American pit bull terrier is not recognized by the American Kennel Club (AKC) so alot of Pitbulls are registered as Staffordshire bull terriers. the american pit bull terrier is a new dog ( a cross between a bulldog and other large terriers).