Except Naruto has been shown to not only withstand Shinra Tensei, but also deflect it back onto the user. And he was only in six tails then. I don't need to tell you that he's obviously a million times stronger now, and can likely withstand any range of ST, if not deflect it back, or at the very least mount an adequate defense.
I forgot about those incidents. And right, it could very well be a grain of dust or some particles.
I disagree. A contest between Naruto and Sasuke boils down to a case of Sasuke trying his best to dodge nukes. He may have the upper hand in some situations, but they will always be short-lived. Naruto is faster. Naruto is stronger. Naruto has the better reflexes. Naruto isn't as smart as Sasuke but he's definitely shown himself to be decent numerous times throughout the manga in high pressure situations.
Not to mention, most of Sasuke's rinnegan techniques are effectively useless against him. The only one that could be a modicum of use is chibaku tensei with Naruto as the core. And that can simply be overpowered with his Kurama avatar.
Which leaves two techniques, or the combination thereof, his space-time ninjutsus: amenotejikara and the portal one. In most cases, they're simply one-trick ponies. Neither of them can be spammed to mount a serious attack. Which means Sasuke would need to time it right. Teleporting Naruto in front jutsus wouldn't guarantee anything, especially now that Naruto knows it's something Sasuke can actually do (as he's seen it be done to Madara). Plus I don't need to remind you that Naruto's sensory perception and durability are off the charts. He quite literally dodged a light-speed technique from point blank range. And teleporting behind Naruto would be just as much of a risk to Sasuke if not greater. Because again, teleporting there and actually landing the hit use two different speeds, the latter of which Naruto is faster and more capable. And this time, Sasuke won't have the element of surprise on his side (as again, Naruto would be expecting it). And I don't need to go that much into detail about susano vs kurama avatar stuff, because obviously his Susano is much more inferior, especially more so now that he doesn't have all 9 bijuus.
To me it's kinda funny when the only way of defeating Naruto is by trying to throw him into some other portal and hoping he dies there. Tell me, how do you see Sasuke beating Naruto?