When I stop and think about this, this post is simply asking us to define their running style.
Being "elusive" is awesome, but so is breaking through tackles. One style over another is purely subjective and therefore it's not fair to say one is a better attribute than the other. Depends on the factors of each play, of each series of downs, what the defense is showing you and what part of the game you're in.
Last year I saw Wadley make some cuts that I hadn't seen since B. Sanders ran wild back in the day (and defied several laws of physics while doing so).
I welcome Butler to the Black & Gold with open arms, and hope he pops for 1200yds+ in front of his family and 70,000 of his newest best friends at Kinnick.
But if I'm up against it with the clock winding down and we have a shot at upsetting someone, when it's 3rd down and we need 6 yards at crunch time...gimme Wadley every time.