Theres is way more to stats when dealing with defense...
Wade and Curry's team both play with COMPLETELY different defensive mentalities.. Wade would look a lot worse playing on Golden State, Curry would look a lot better playing in Miami. And it goes far beyond that. I really dont believe compiled "defensive stats" are going to be the best way of evaluating a players defense.
Even comparing them offensively is a stretch, they both play completely different games and the offensive philosophy of both teams is so different.
Ill say this, at 25 Steph Curry is already a much better distributor than Wade has ever been, and hes already probably the best shooter in the NBA. Combining those 2 things offensively is a special thing. He has a long way to go to match Wade career wise, but if im putting a team together today im picking Curry to build around before Wade.