Well I'd say its a matter of who gets tired first, Naruto has approximately 15 minutes of SM, and Sasuke I'm not sure.... Until he goes blind.
Sasuke will have the offense, but it will be useless with Naruto in SM. Naruto has probably one of the best sensor abilities in the manga with SM, and his threat perception rivals that of the sharingan. Naruto will not be able to break susanoo, maybe he can I'm not quite sure... His super strength or maybe his rasenshuriken? We saw what danzo did to it with wind, and tsunade with her strength.
This is probably the most equal Naruto and sasuke have ever been, which is why I say the battle will be won in the last 5 minutes of Naruto's SM. If Sasuke can stay in susanoo continuously for 15 minutes, he wins. However, if he cant, Naruto will most definitely seize the oppurtunity and beat him.
Oh and the sharingan won't be of help to Sasuke in a taijutsu battle as Naruto will easily use frog kumite along with his senjutsu manipulation to beat him. xd