SM Naruto that fought Pain would beat Hebi Sasuke low-mid difficulty. This would be obvious if you read this manga properly.
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Anyway SM Naruto is faster than Hebi Sasuke since he managed to cover a massive distance and blitz Asura path in a small amount of time. During the time Naruto ran towards Asura path, Tsunade was very surprised which shows that Naruto has the speed to overwhelm kage level opponents easily.
Naruto in sage mode can
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so he'll be able to locate Sasuke's positions at all times and even predict what Sasuke is about to do next. Sasuke could do the same with his sharingan but the sharingan can't predict what is happening behind Sasuke. This means Naruto can't get blind sided whereas Sasuke can.
Naruto's rasengan in base is roughly equal to Sasuke's but in sage mode,
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. Just compare the size of his rasengan compared to himself whereas Sasuke's chidori isn't even as big as his body.
In close quarters, Naruto
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even with Sasuke's precognition since frog katas can't be seen even with the Rinnegan which can see chakra so the sharingan won't tell when Naruto is about to use it.
Hebi Sasuke does have the ability to summon various snakes which people tend to forget so he can keep Naruto's toads at bay but doing so will deplete Sasuke's relatively poor chakra reserves whereas Naruto won't lose much chakra from doing so.
Most of Sasuke's raition techniques are neutralized by rasenshuriken.
As for genjutsu, Naruto can avoid eye contact and still fight even without looking at Sasuke because he can sense Sasuke.
If Sasuke manages to prep kirin, he wins, I doubt rasenshuriken will suffice as a counter since lightning kirin is natural lightning, not a chakra nature based attack.
Anyway it should be obvious that the opponent SM Naruto fought was much stronger than anyone Hebi Sasuke faced off against.