Noblesse Oblige.

In the latest Naruto chapter, it was mentioned that Naruto is stronger than Sasuke. WTH no effing way D:
Let's compare.

Naruto:
Shadow Clones
Rasengan
Summoning Jutsu
Rasenshuriken
Kyubi
Sage Mode


Sasuke:
Taijutsu
Sword proficiency
Hebi-jutsu
Katon-jutsu
Chidori
Lightning shape manipulation (Chidori blade, needles, current)
Sharingan
Genjutsu
Summoning Jutsu
Kirin
Mangekyo Sharingan
Dimension manipulation
Amaterasu

Curse Seal (Gone after Orochimaru's death)
Orochimaru regeneration jutsu (Gone after Orochimaru's death)

Intelligence-wise, Naruto is getting calmer thus thinks more clearly; however, he still fails to Sasuke's genius.
Naruto's Shadow Clones mean nothing to the Sharingan.
Sasuke can burn away mass Shadow Clone with his Katon jutsu.
Rasengan is evenly matched with Chidori.
Naruto can summon Gamabunta which puts Sasuke at a disadvantage since Sasuke killed Mandato to save himself. Of course, Sasuke can always beat Gamabunta by himself with either Genjutsu (worked on Manda), Kirin, or Amaterasu.
Rasenshuriken is avoidable with Sasuke's Sharingan, and he can probably see through any tricks Naruto might pull.
Kyubi will become a problem for Sasuke if Naruto manages to go past 4 tails. However, we have seen Sasuke halt Naruto's transformation with his Sharingan before it gets out of control.
So the only thing that Sasuke will have trouble with is Naruto's Sage mode, especially since he doesn't know about it.

Naruto's Sage Mode grants him a wider range of abilities, such as improved taijutsu, stamina, and variations of Rasengan. His Shadow Clones are less useful, because they are needed to maintain and gather natural energy back in Myobokuzan. Sasuke can probably hold his own against Sage Mode with his Sharingan, but some of his abilities will be rendered useless. It seems Sage Mode has a resistance against Genjutsu, and Naruto's enhance strength and agility will be a match for Sasuke's taijutsu. Kirin isn't dodgeable, but Naruto can prevent Sasuke from casting it. I think it'll come down to a showdown between Sage Mode and Mangekyo Sharingan, unless either individual learns some new technique before they meet.