As much as I hate getting involved in other people's debates, Preta Path can most definitely absorb a rasenshuriken, even more so than other techniques. Preta Path (barrier) works by spiralling the chakra and absorbing it. Therefore something already spiralling isn't gonna do anything but add to Sasuke reserves. This, Naraka, and Deva are why I can't see Naruto winning, even though I agree that they would be fundamentally equal. All of Naruto attack are energy based on rasengan, and they can be absorbed.
You pair that with the fact that Sasuke is able to rip Naruto's soul out if he touches him, and it places Naruto on ranged mode, with nothing that can him Sasuke, unless he enhances it with Sage Mode, which, unless fired in quick succession, can be countered with Deva Path. And while I agree Naruto has slightly more damage output, when it comes to the Bijuu Avatar, Animal Path Kuchiyose are a factor in being Sacrificed, and giving Sasuke more view, also making them harder to hit. Furthermore, Asura Path clones give him the CQC ability to overpower Naruto, and give him the upper hand in short range. Usage of Coreless CT has not shown a counter, but I suppose you can outrun it, but you would have to constantly move.
All in All, if Sasuke can restrain Naruto, it's a win for him, via Naraka, Preta, or the king of hell.
If Sasuke can fool Naruto into shooting enough Non Sage Chakra at him, he wins.
If Sasuke can absorb TBB he wins 7/10
If Naruto keeps the battle Ranged, and saves his chakra for a melee assault, (he can't use ninjutsu enhancement though) he can pull a win 5/10 times. He has to physically outmatch and avoid Sasuke, within a five second interval.
There's a reason Kishi stopped displaying the six paths.