I'm of the opinion that Kelly is untenable as a premier league RB. I don't understand what anyone sees in him going forward. He has trouble controlling the ball when it's played to him, even more trouble maintaining possession with his passing game, and his movement away from the ball leaves me scratching my head pretty often. He takes miserable 20 yard touches towards the touch with his head down, which I think some people may mistake for useful football. He looks to have no idea where his teammates are, and I don't remember seeing him ever pick anyone out with a cross. The only goal, hell the only chance, I can remember him setting up with a cross is the own goal at Hearts. I see him as the antithesis of what a fullback should look like in Rodgers' system.
Wisdom, on the other hand, is fantastic in possession. He isn't going to race to the touch with his head down and launch in aimless crosses, but why would you want that?