Board Thread:Theories and Speculation/@comment-26388300-20160325102110/@comment-28869806-20160414131933

Thekillman wrote: Naruto's instincts went rusty, not his actual powers. Kurama berated him for not paying attention, as with his godlike sensing he should've been aware that Shin marked the sword, or he should've seen the sword coming. But he tanked that sword (which also cut Madara in half) and then went on like it's nothing.

There's nothing to suggest that Sasuke is stronger. The whole manga theme has always been that they're roughly equal. I want to believe that, but I can't Naruto got rusty in both instincts and powers, Sasuke didn't, Sasuke remained at full strength he never grew rusty.

let me put it this way, the last Naruto and the last Sasuke were equal in power, since then Naruto got weaker, Sasuke got stronger creating a huge gap between them that at this point isn't going to be filled easily.