When people read the VoTE 2 fight they either say that "Sasuke was nerfed because he didn't do X,Y,Z" or they say that Naruto was superior because even though Sasuke had the Bijuu Chakra Naruto still matched it and whats wrong here is that people are looking at the fight from the prospective of powerups but what Kishimoto did was he had the fight take two stages. The fight stage had naruto and Sasuke with powerups and their best abilities at hand in which they stalemated. The second stage, Naruto and Sasuke had no powers at hand besides their own personal power and this is the more important of the two because in this case they didn't have immense powers to rely on so it was a true test of strength, much like how VoTE1 started out but what did we see?
The very first thing Naruto did as soon as they fell from stalemating each other was rely on the Kyuubi's chakra.
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Then Sasuke loses control of his eye and Naruto relies on his own power, Kagebunshin to perform a barrage but Sasuke countered it with his taijusu and shurikenjutsu
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Naruto counters sasuke with the help of a bunshin
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Charges at sasuke with a rasengan and tripped over canceling his own Jutsu. They had some hand to hand combat and were both exhausted then guess what happened again? Instead of continuing to fight for himself he relied on the Kyuubi's chakra. Sasuke used his jutsu to absorb it and
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Now bear in mind that HE COULD HAVE DONE THIS BEFORE but instead relied on the Kyuubi's chakra. lets go on and see what else happened.
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There you have it. Relies on the Kyuubi's chakra for the third time. Whats more interesting is that the chakra the Kyuubi was giving him all this time wasn't even it's own; it was just Chakra it gathered specifically to give to naruto. The whole fight was going pretty decently when they were using whatever they had available to them. Sasuke would have never been able to make that Enton Chidori if Naruto was Man enough to continue fighting for himself instead of leeching off the Kyuubi and we know he had fight left in him because he punched Sasuke into a rock. So all in all Naruto only won because he leeched off another power source but putting powerups aside, Sasuke is most likely stronger. That's manga fact.