Who is stronger saskue uchiah or naruto uzimaki?

Naruto Uzamaki . Ill go over 3 things to prove this.

Speed: If naruto has mastered sage mode then he has at least a third of Jiriyas speed which is way faster than sasuke.

Strength: In naruto's battle with pein he beats up a guy without even touching him. The nature chakara around him extend his punches and make them stronger.

Jutsu: Sasuke uses Lightning style. Even though has more than 3 chidori type jutsu lightning can be defeated easily by wind. Rasen Shuriken.

Even so some people say Sasuke is stronger cause he has Mangekyo Sharingan and they might be right. There is no sure way of telling until they actually fight.