Board Thread:Naruto Discussions/@comment-25498052-20141004162612/@comment-25272406-20141109225910

Agreed. On both -> keeping them equal and that taking chakra from 9bijuu is actually more op than taking natural energy unless Naruto would have been able to absorb an ammount equal to the Bijuus which is very unlikely.

But we also don't know HOW MUCH chakra Sasuke took away (I don't think that he took all of it because they would have to "go to sleep" like dark Kurama) and in which way. It's definitely not as effective as being a Jinchuriki (with control over the Bijuu). And it was not perfected like when Sasuke took Kurama's chakra he wasn't instantly able to use it the right way

So in every way I think that Sasuke and Naruto are equally strong. But still both of them are not at their limit. And both can learn completely new techniques (due to them having all nature tranformations ....) and some techniques of the other. (Rasengan and Sage Mode is nothing Sasuke couldn't learn too, and so are some of Sasuke's techniques).