career, but he isn't in Miller's class (at least yet) in defense, passing, or rebounding. Miller has always been a great rebounder for a guard.
However, I don't think it's unfair to compare the two; they play a similar type of game with similar style.
Going from memory, I thought Miller was taller, but he's listed at 6'2", 200 lbs. Jimmer's listed at 6'2", 195, so they're almost exactly the same size.