Naruto won vs Pain and Killerbee won vs Sasuke (without his team he would've killed him 2 or 3 times). Don't start the discussion again that Naruto got help from Hinata and he needed the fox and that kind of non-arguments. He won in the end that's what counts. Think of poor mr. Kishimoto who needs to come up with a new exciting story every week. Of course Naruto can kick Pains ass. Pain was just a testdummy for sagemode, as Kakuzu was for the Fuuton rasenshuriken, as probably Kisame will be for his new fox powers. And in every fight the bad guy tends to win in the middle then a dramatic violin starts to play, flashbacks, BANG ! new powers and an asswhooping. So Naruto and Killerbee 2 full fledged Jinchuurikis for the win.