He may not be better than Cartwright but he ain't worse. He's a better shooter and doesn't turn the ball over as much. Plus I think he is just as good of a defender. Cully's numbers in a slow offense as a freshmen are not that far off from Cartwrights as a Junior in an uptempo
Cully is a slightly better shooter. Cartwright has a better FG%, but Cully still has the edge as a shooter because a lot of BC's buckets come on layups and floaters. Defense is pretty equal. But Cartwright's assist numbers are much better, especially after he found his groove early in the Big Ten season. But Cully had the same average in TO's in Lickliter's offense as Cartwright had this year. In that slow down style, you should have lower TO numbers than you would in an uptempo offense.
Cartwright is the better overall player, while Cully is the better shooter. But as a PG, I'd prefer the guy who's a more efficient distributor (Cartwright). Cully would have been a solid backup at both guard spots. But he's not really an uptempo player.