Board Thread:Naruto Discussions/@comment-44437908-20200709043715/@comment-31715856-20200709232354

There is no evidence that Naruto is using a different form in Boruto. The design has been inconsistent after the end of the original manga. You're reading to much into it. If either Naruto or Sasuke had lacked Six Paths chakra, they wouldn't have been able to hurt the Otstuski. Or rather, Sasuke wouldn't have been able to hurt them with his Ninjutsu, but he did. And since we know Sasuke doesn't know Sage Mode, the only option is that he has Six Paths chakra still.