Depends on how tje fight starts.
But if Naruto can survive this fight long enough it could end up with Sasuke nearly dying due to lack of chakura.
So I think High- Extremely high diff.
Wise and logical answer

, thank you
naruto solos sasuke(with ps and ems) in base mode.!!
oh no please stop talking bullshit. I don't want this thread to be turned into Naruto vs Sasuke war.
Of course you are wrong but fanboysim stop you from watching reality, sad
Nvm lol its KCSM Mode...
Madara feat susano Sasuke > Low diff kcsm Naruto.
Current PS Sasuke > Mid-high Diff KCSM Naruto.
ok... but why so sudden change of your mind ?
This is not just KCSM but also he has mastery over FTG v2 which allow Naruto to use suprise attacks on Sasuke from different angles... Do not forget that Ma and Pa and all frog summons are there as well. If Naruto utilize FTG v2 using clones especially then I think he is quite formidable.
I do not doubt Sasuke win but clearly you understimate that hypothetical Naruto...