First of all, he is mobile. If you ever watched Pitt then you see the QB on the move with bootlegs and rollouts. JP of course, can provide that.
JP will also cover up the O-lines inability to pass protect. He is a threat that the "D" cannot ignore and if they put a spy on him that opens up the passing game to which JP is capable of doing, because of his strong arm and quick release.
MM likes to run trick plays. Which QB of the two has the athletic ability to pull it off?
JP is a rookie, so he doesn't have old habits that are hard to break. Did you ever hear that saying " You can't teach an old dog new tricks ". JP doesn't apply to that, but Drew does.
I definitely think JP will put up more points for Buffalo.