You make a very good point, real live game atmosphere is difficult to simulate, and does often breed different results. I can only go on what I saw in a couple limited scrimmage sessions and parts of practices. IMO, based off what I watched he will do well next year. He has the skills necessary and performed very well against the current roster of guys and that includes being matched up with Aaron W. The real question to me isn't really how good are either player when compared to each other it is more of a question of how will Fran spread out the minutes with a growing group of talented wing players.
Honestly, if I was to compare Uthoff to a certain player my choice would be Kyle Singler former Duke forward.