You mean
Yin Kurama / Naruto vs. Shukaku/Matatabi/ Isobu/Son Goku/ Kokuō/Saiken/Chōmei /Gyūki/ Yang Kurama and Sasuke
LOL you're comparing Sasuke having the Bijuu with Naruto?
Sasuke gains the Bijuu chakra through FORCE,Naruto got it through FRIENDSHIP.Naruto also has a 1000 year old entity helping him out - Sasuke deosn't have any Bijuus loading up chakra for him,or talking to him.He deosn't have a single Bijuu gathering chakra for him while he is fighting Naruto.
It's Sasuke vs Naruto and the Kyuubi - that is clear - Sasuke forcefully gaining their chakra deosn't change that - and as i said - theres no 1000 year old entity helping him.
Also,Naruto had chakra from all the Bijuus when the battle started.
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Then he used it up in battle.
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If Naruto didn't have the Kyuubi he would of ran out of chakra and lost - the Kyuubi saved Naruto.Who's gonna be loading up Sasuke's chakra? Sasuke.