Sasuke even said when he was fighting Naruto at the Valley of the End, something about his eyes not being able to keep up with Naruto because Naruto's attacks are unpredictable. Naruto can animate the chakra to attack in different forms. Like he can make an arm come out of his arm, an arms come out of his back, make his hands bigger, and a lot of other things to fit the situation.
Also at the Valley of the End, when Sasuke used a fire jutsu, it didn't affect Naruto at all. Naruto didn't even bother blocking it.
Naruto has one of the most versatile forms of taijutsu, and I think Sasuke's current he genjutsu has no affect on him. Naruto could dodge Amaterasu, Susano Arrow, and Susano's attacks. (Kabuto was able to dodge in Dragon Sage mode). Also, if Susano'o is made out of Chakra, then maybe Naruto's chakra arms can go through it, who knows? Naruto with his chakra can also outlast him. If Naruto uses chakra arms, then Amaterasu might not do anything to him.
Edit: And also they have not even fought again that much yet, so who is stronger could just be assumption.