to make simple, last time we saw sasuke in fight, was against Raikage, and he couldnt do nothing about his speed, yes he was able to follow him with his sharingan, but his body couldnt react at all, on the other hand naruto i believe was faster than raikage, when he uses sage mode, and in case im wrong naruto now has the legendary yellow flash of the 4th hokage, which is basically teleport. well that been said, rules out the fact that sasuke's speed is childs play for naruto, now if sasuke where to use genjutsu on naruto, naruto can break free, so genjutsu is not a problem anymore, now amaterasu, thats something that sasuke wont be able to put on naruto do to his lack of speed against naruto, other option would setting the ground on fire to if naruto is stupid enough to step on it lol, now in case sasuke is cornered by naruto which would probably be the case, he will use susano as his absolute and more powerful defense, if hes able to do it, we might as well consider that he can draw out the sword of totsuka, which so far could be called the best offense yet to be shown in the serie, now if he sasuke actually does that, thats when naruto will draw out whatever was that itachi gave him, and i believe its strong enough to break susano in pieces, cus itachi left this to naruto with the only purpose of stopping sasuke if he where to go berserk against the village or anyone from it, so at the end theres alot we need to find out, but as far as the manga goes, sasuke is no freaking match for naruto...