I want to say that KO's game translates better. Kaminsky can play defense ok in college, but he is going to get totally exposed there in the NBA. I am very interested to see his combine results because I think they're going to be awful.
Granted, KO only had 5 reps on the bench press, but his lane agility was really good and I don't think Kaminsky is going to touch that. At the end of the day, Kaminsky will have his shooting - which is on par with KO - less agility, equal or less strength and probably better post moves, but you're not going to really base your offense on Kaminsky in the post. Plus, if he's in the post, he's not going to be shooting, which is his best NBA skill. KO has an equal college arsenal, but more of what he can do translates to the NBA than what will happen for FK.
I mean I could be totally wrong, but the Kaminsky games I've seen haven't made me think he's going to be a particularly good pro.