I'd take Wade, but in Iverson's defense he played alot better and efficiently when he had another scorer along side of him, and offensively his last season in Philly was ridiculous. It was fun as hell watching him cut through defenses like a ginsu and setting people up, and Webber was eating pretty good near the elbow from those kickouts; especially since all he was doing was spotting up near there because Iverson had the ball so damn much lol (outside of the occasional pick and roll from the high post).
With that said, even though offensively Iverson had the best statistical season out of the two (imo) what made Wade's the better player offensively was his ability to play off the ball; Dude was juking players off of him and freeing himself up like it was nothing, getting himself quality looks without dominating the ball. Iverson could free himself up, but was inconsistent when it came to catching and shooting, and was much better off of the dribble, which pretty much assured his numbers would drop once he couldn't dominate the ball. Even when he was in Denver and playing as a #2(or a 1b if you want to call it that )to Melo, he still didn't play off the ball that much: Instead Melo and Iverson took turns Isolating when in a half court set, which made them pretty easy to defend when they couldn't get over on teams with just athleticism and talent( George Karl should take some blame here though). Iverson showed he could defer to an extent, but he still very much needed the ball to score, and that just isn't the case with Wade, which is why I'm picking him.