He's also the one that, when he found out Spider-Man's identity, did a complete 180 on his opinion on him, saying that the Bugle would actually help Spider-Man from now on. In contrast, when the 616-version found out, he got so angry it ended up giving him a heart attack, and drove his hatred even further. Of course, I think the one of the main difference is that in the main continuity, Jameson felt that Peter had conned him out of every cent he paid for Spider-Man, where as Ultimate Spider-Man had just saved Jameson's life.