I will completely disagree with him being a better shooter. Marvin williams broke his shooting hand early this year, but since he took off that partial cast on it, he has been shooting about 50 percent from the field and almost all of his offense is jumpshots right now (thats not a good thing) Plus he definately has more range than Durant. I forgot to add that Kevin is a much better passer than Marvin williams. But right now Shooting(not by much) Ball handling and overall defense I give the edge to Marvin Williams. Shot blocking, and Passing I give to Durant. I do agree that with his long build he should have the chance to be a better defender, but at the same time, he literally doesn't try alot of games to defend anyone. Thats not cool.
By the way, don't get me wrong. In no means is Marvin Williams a great one on one defender, but he is better than durant. You honestly want to see what I think a real NBA comparison to Kevin Durant? Darius Miles. I think he would have dominated in college because he had a simular build and offensive skill set ( Durant is a better shooter though) but I just don't see it in the long haul.
This may sound a little corny but the difference between Miles and Durant will be Durants will to improve, and win. The guy plays his ass off all the time, and has the mentally of someone wanting to be the best. So he'll be like a fusion of like Miles/McGrady with more of a killer instinct.