1. You are correct about Hudons' height, but he has never shown much of an inclination to rebound gathering in 142 rebounds in 67 games at VaTech compared to Beal's 249 rebounds in 37 games. Now it is possible that Hudson will take to the SF position and become a rebounder as you suggest he is athletic enough to do so. [Of course that team with Beal did not make it to the final four as often happens to good 3 guard teams.]
2. Hudson's offensive rating, ie points produced per 100 possessions, was an indifferent 98.7 as a Soph and 96.1 as a Frosh. Beal on the other hand had a good to very good offensive rating of 115.4. Hudson is also a career 65.9% shooter from the free throw line. BTW, Hudson ACC game offensive ratings are a bit worse than his overall ratings.
3. Now there are reasons to be optimistic about Hudson. Barry is actually a very good comp for Hudson though Barry was a much better rebounder a CofC than Hudson was at VaTech, still they are similar offensive players, ie 6'6" guys who are pretty average from the arc but good at slashing to the rim and getting to the foul line. Barry has so far improved is offensive rating a good bit playing with better players and for White. If Hudson playing with better players similarly becomes more selective in his offense, then he too might take that jump. Really the big difference that I see is in rebounding. Barry is a very heady player, using the rim to protect the ball from the shot blocker that other UF players have followed, and he rebounds very well. It remains to be seen if Hudson will be able to contribute like that.