No his age doesn't matter. I just look at him as a Soph. Even though by rules he is a freshman.
Based on pure experience it's Stenzel. It depends how you look at this question, who will have a better season this year? or who will be a more talented player by the time their senior year comes around. I think Stenzel will have a better year this year because he will get more p.t. In the long run though I still think you have to go with Tregg Setty. His size and shooting ability are great talents that will enable him to be a REALLY great player in the near future.