He’ll know from touring the music facilities/professors and meeting other admitted students and current students who’ll he’ll likely interact with in the future as to where he wants to be. Their locations and communities are very distinct as well. I think on paper we could all try to differentiate these two schools, but as you’ve seen yourself, they provide quite different experiences that just can’t be explained with statistics or listings of opportunities/financial resources.
Please keep us posted as to what he selects, and why. Ultimately, at the end of the day, it’s looking forward to the superlative experiences awaiting him at wherever he chooses, not what could have been at the other.
P.S. My personal vote is for Williams 