I think people have to understand something fundamentally different about this fight. It seemed skewed towards Sasuke because he wanted to kill Naruto and wasn't holding back. While Naruto was only fighting Sasuke enough to keep him from killing him and to try and save him from himself...
The amount of Chakra that Naruto can store, channel and manipulate is otherworldly amongst the other fighters his age, let alone the many hokage that came before him. Yes he doesn't have the shear technical skills that Sasuke has but Naruto shares that natural Goku fighting spirit where he will find a way out of no way to get the job done.
Also Kurama is clearly the strongest of the tailed beast, back when Naruto had just merged with Kurama fighting Obito and reanimated Madera. All of the tailed beast they had under control made beast balls while Naruto and Kurama matched that power even in those early stages of them uniting their Chakra...







