... that's like saying Usopp is stronger than Luffy...
From many chapters ago we knew that Naruto will get a new power-up, getting the other half of Kurama; and it was not an ass-pull because the object of this power-up was clear, meaning this other half. But Sasuke has reached his full capacity, EMS, and hasn't shown its full power yet. On the other hand, the only legit and probable power-up for him would be Juggo-based sage mode, other than that I personally can't find any trace forshadowing a power-up or sth. So Sasuke is so stronger than Naruto that Naruto must get power-ups to be on the same league and have the final fight with each other after this war. What accentuates this is presumption that Naruto will be the next SO6P, so..
Conclusion
Sasuke is much more powerful than Naruto, so deal with it dudes =D
Sasuke solo'd the juubi, naruto got roflstomp by it.
Have you seen who the enemy is? Obito with the power of So6p. Naruto is powering up to match him, not Sasuke... Do you think Kishi would worry about making Naruto and Sasuke equals while they are battling a God-like opponent?
I doubt Naruto will use his full power or combine modes to deal with Sasuke and I doubt Sasuke can reach that power with only EMS. If EMS could give you that sort of power, Madara wouldn't have gone the extra mile to get the rinnegan and tried to be the Juubi's jin.
Let's face it, Sasuke isn't powerful enough to match Naruto unless the manga shows otherwise and please stop with the Fanfiction U_U
Naruto and Sasuke are actually rather even at this point in time. Don't know why all you Sasuke fans think that Sasuke solo'd the Juubi. Bear in mind that Naruto is more clumsy than Sasuke, and doesn't often think things through. Rather, he charges head on into things.
Sasuke fan boys are so blind. "Sasuke Soloed the Juubi" Lel, ***** plox.
I'll take it as a joke...
Good one...
By current feats Naruto is stronger.