The only reason I listed pituophis catenifer is that every snake labeled "pituophis catenifer" ssp. is considered a gopher snake. The bull snake is Pituophis Catenifer sayi. So they are technically the same species. Just a different subspecies right? This a question I am not trying to be a prick. I don't know a heck of a lot about taxonomy. I just know that "Pituophis" is the genus and "catenifer" is the species. As far as looking different. I think bull snakes and gophers look and behave very similarly. They may have different colors/patterns but they are not that different. The way I see it, Gopher to bull snake is the same as Eastern Garter to Common garter snake. They are basically the same snake. Just some minor differences.