The problem is huge chakra =/= combat skill + chakra usage...
The one is fighting is Naruto, same to Sasuke, they both have access to huge pool of chakra, 0,5vs8,5.
Both have same ability to take chakra from certain source and use it.
We can not say itachi and 8,5 bijuu is fighting when they are the source of the power same to half Kurama when Naruto only has access to chakra. He can obivously able to take chakra from kurama or control kurama since turtle arc and now rikudou enchanced make it easier, but that is not Naruto character and his promise to treat Kurama as friend.
The one is fighting is Naruto, same to Sasuke, they both have access to huge pool of chakra, 0,5vs8,5.
Both have same ability to take chakra from certain source and use it.
We can not say itachi and 8,5 bijuu is fighting when they are the source of the power same to half Kurama when Naruto only has access to chakra. He can obivously able to take chakra from kurama or control kurama since turtle arc and now rikudou enchanced make it easier, but that is not Naruto character and his promise to treat Kurama as friend.