Which team is best for development?

My younger DS who is an 09 and will be a freshman next year has been doing club tryouts. He has two really good options and both of them are pressuring us to get a contract signed to lock us in.

DS is a utility player--he can play anywhere. He had a game a few days ago where he played half of the game as midfielder, a quarter as fullback, and a quarter as winger. He did equally well in all positions. He is also a bit of a late bloomer puberty wise--so while most of the kids in our area that...

Which team is best for development?