Naruto alone could kick his butt easily , maybe Sasuke too with his new EMS powers
Sasuke should still be stronger than Naruto at this point. It's just how the manga is progressing...Sasuke is always stronger than Naruto and by the time they would fight each other it's actually a challenge for naruto to win. So if naruto can beat Kabuto, Sasuke can for sure. And Kabuto is really weak anyway.