It's hard to say. I used to think "Robert Traylor" but BBD is better. The skill that puts BBD ahead of guys like Traylor, or Brandon Hunter is is passing, first of all, and then his handle. BBD can bring it up the floor angainst any power forward in the league, and that's a useful skill by itself.
Davis still does not know how to use his wide body inside. If he learns that, he could be a ten-year pro: starter on a bad team, 6th or 7th man on a good team.