After watching the videos, I would give Harrison the upper hand. He can make all the throws, deep, touch, sidelines, quick, etc. He also seems to pose the greatest threat as a runner. Pennington has the size and obviously the bloodline. Good footwork from the video, but looks like to me he needs to work on his mechanics a bit in throwing. Not a lot of tight spirals. Zamora has a strong arm, and accurate ball. We didn't get to see him throw under a lot of pressure. Big kid, throws a nice fade. Didn't see much running though. Can tell he is a leader. Harrison to me looks like the one that you would want on 3rd down from the videos. He has some nice improv skills along with traditional QB skills.