Durant was a better choice. He has more drive/determination to be an all star. I read an article in ESPN Mag that had them each writing a paragraph about looking forward to the NBA (can't remember exact topic).
Anyways, Durant was all about his conditioning, how he wanted to make it since age 9, wants the ball in his hands, wants to be able to take on the best. Oden said basketball wasn't everything, that he wanted to come in and be the role player the team needed, and that he needed to be more aggressive.
If I were a GM I wouldn't pick a guy who had all the talent to be a monster but none of the drive, even if good centers come once in a blue moon. Gimme the 6'9" kid who wants it as bad as LeBron.