Stuckeys advantage is his NBA size and ability to comfortably play 1 through 3. Stuckey is more athletic.
AJ has the edge in leadership, perimeter game, and the quickest release I have ever seen. AJ has to work on his ball handling and passing to be a frontline PG. As is, I can see him as a Vinnie Johnson type swing guard off the bench. Seriously, his release, stop and pop are already NBA caliber. Scoring wise, I think AJ is a better scorer off the dribble. Stuckey though is a load in the paint and has the advantage.
Stuckey is better rebounding, but that role all depends on the team and supporting cast.
AJ will need to continue on his Weber State performance to have a legit NBA shot. The recognition was there for Stuckey from the get go. AJ is just now starting to get it, but has a long road to travel, but has a chance. He is not the surefire player Stuckey was.
Defensively, Stuckey has the advantage due to his size and athleticism. I question if AJ has the quicks to stay with frontline NBA PG's.