Board Thread:Boruto Discussions/@comment-30168130-20161222234934/@comment-734582-20161226084307

Keep in mind that while Momoshiki without a doubt is stronger, the entire point of his character is that he doesn't like to work hard. Naruto on the other hand has years of battle experience. And we've already seen that battle experience counts.

On the other hand, Naruto was losing versus Momoshiki until Sasuke helped him.