Interesting question comparing Kelly with Grant. Kelly looked very good during pre-league play, but seemed to slow down as the season went on. Was he hurt, or was the competition better? As Andre (at 6'-8") played center most of the time, he was usually up against taller, quicker guys that took away much of his inside game. Grant didn't play much early, but played some key minutes during league play. As Grant seemed to be more active and had better shooting range, he was able to be more effective. He also went hard for rebounds, although he often got called for rebounding fouls. To my eye, Grant was the better player at season's end.
Because it was Grant's second year and Kelly's first, I'm not too surprised that Grant got better. I would hope that Andre would likewise improve next season. I think Grant was able to get stronger last off-season, and so should Kelly this off-season. Fox is supposed to be a defensive specialist, so the guy that can play the better defense next year will likely see the most playing time.