The Culver momentum seems fairly strong at the moment. What we know:
* he's capable of putting up mediocre numbers in a supporting role (ie his freshman year)
* he got better in his soph year.
* he was the best player on a team that made it to the championship game, though we saw that he could be shut down for several games.
* he didn't that much taller.
* at his sophomore state, he's still not as athletic as Barrett
Barrett:
* he had monster numbers as a lead player as a freshman, dwarfing Culver's soph stats.
* critics point to his perceived weaknesses - left-hand dominant, suspect ball handling, shooting, defense, all of which were superior to Culver's skills as a freshman
* he has a level of aggression in his game that you don't see too often. He makes things happen, he makes the defense react.
It sort of blows my mind to think folks think that Barrett (1.5 years younger than Culver) would stand pat on his game. Barrett is the higher upside player - he's younger, more athletic - and has shown more at an earlier age. Refinement of his skills can can make him elite. He can work on finishing with his off hand, his ball handling, his shot. Some think on an NBA team with some shooters, he'd look even better.
People seem to think he'd be lost in a lower usage role, perhaps like Doug McDermott or Evan Turner have been in the NBA. That might be true. A lot of college stars don't pan out and struggle for years or don't turn the corner and become journeymen.
Culver might be a little more equipped right now to be a steady role player, even a starter. But the same thing that holds Barrett back (his shot) is just as much an issue with Culver.