The thought process on Naruto vs Sasuke is too boring, I think. What if Sasuke starts using the Bijuu CT as meteors? Naruto can't just casually destroy them, because then he'll harm the Biijuu as well.
What if Sasuke goes inside Naruto's soul, like he did before? That would put an entirely new spin on this fight, and open up all sorts of unknown abilities.
What if Naruto uses a new Bijuu Mode that actually incorporates all the powers of the Bijuu? And gives him some newly defined powers? Along with that, what if the reason Naruto's TSB didn't show the Yin-Yang negation is because they have a different (new) ability?
While I'm on the subject, what if this new Chakra Form of Naruto's is the form that Ashura took (the human version, of course)? When he attacked Kaguya with his chakra arms, she had no weird reaction. But when he attacked her with the combined RS of the 9 Bijuu, she reacted to all the Bijuu chakra. That would imply that this new Chakra Mode is not a combination of the 9 Bijuu, and opens up the possibility for more power and explanations.
Idk, I just think there's a lot more that can be theorized and discussed than just "Naruto beat CT before" or "Naruto never faced this kind of CT".