so.... i just have a few points to raise.

1) in the final battle, wasn't sasuke aiming to KILL naruto while naruto was just trying to defeat Sasuke? There's a pretty big difference b/w aiming to kill and aiming to capture alive. Despite this huge handicap, naruto won.

2) sasuke's big powerups come from his eyes basically giving him overpowered jutsu. Naruto's powerups come from learning abilities/jutsu in a few days, that should have taken years for capable jonin, plus having Kurama's cooperation. In other words, Sasuke looks like he's limited by the extent of his dojutsu and his ability to apply them in battle. Naruto... doesn't really have a limit beyond his willingness/need.

Then there's also the fact that Sasuke... basically relied on Naruto to overcome his 'hatred' for him. Naruto overcame not only his own hatred (his dark self), he also overcame Konoha's hatred/ostracization of him, as well as the Kyuubi's hatred. Mentally speaking, sure sounds like naruto > sasuke xD.

Not saying that sasuke is weak... but its pretty hard to say sasuke is 'stronger' than naruto. Hell, if you break it down, the strongest genjutsu of sharingan (tsukuyomi) is useless against naruto b/c he's a jinchuriki synchronized with his biju. That leaves taijutsu, ninjutsu, senjutsu, and fuinjutsu. Naruto would outlast in taijutsu and ninjutsu (plus potential to learn alot more ninjutsu), he's better in senjutsu. Neither have shown much talent in fuinjutsu yet.