i like sully but think they will eventually trade either sully or olynyk
olynyk seems to have hit his ceiling as a stretch big, a guy that can catch and shoot 3 pointers or create his own shot in the post. He is a limited rebounder and lacks defense potential.
I don't see him getting better as an overall player unless he bulks up to bang down low better and runs the floor better instead of sticking his butt out when he runs.
Overall both seem to lack the athleticism and defensive upside to be stars in the league but i choose sully because he is a slightly better defender and better rebounder, so he has a better chance at becoming a star for Boston.
You think KO's hit his ceiling already as a stretch 4, while playing in the first half of his second year and as a 5? As a 23yo 7 footer? Who is already the best shooter on his team, 9th in the league in 2pt%, and 15th in the league in effective FG%? When you can see him getting stronger by the month and still making correctable defensive mistakes as he learns NBA defense and a new position? When you can see his BBIQ, his passing and ball handling abilities, and his commitment to playing the game unselfishly, in the right way? You think he "sticks his butt out when he runs" and doesn't run the floor very well for a 7 footer?
Oh, there's this too, as a center this year, ESPN has KO as 6th in the league in wins above replacement, behind Chandler, Jordan, Cousins, Gasol, and Horford:
http://espn.go.com/nba/statistics/rpm/_/position/9