A couple of things:
As some pointed out, Kelly was a 3rd year pro during his "rookie" year in Buffalo, and,
Comparing the stats is an exercise in futility because of all of the variables, ie, professional experience, quality of opponents, quality of teammates, et al. If you could put Jimbo on the field with today's players, or EJ on the field with the players back then, that would yield more accurate results. But since that's not going to happen, what's the point.
Is EJ the next Jimbo? Maybe. Or maybe not. Let's circle back in EJ's 3rd pro season and take another look, shall we?