Robinson is averaging 17/12, Sully is at 17/9. Robinson has 18 double/doubles, Sully has 10. It's not just a stats game either, Robinson is carrying a less talented KU team week to week in the rankings, while Sully has been a no show in a couple games and just average in others, with a better team.
Robinson is playing better ball, on a lesser team.
Davis in my gut is the clear #1 right now, but by seasons end I still think it can be either of the two.