I see your point but VoTE2 RSM naruto is his strongest form. As to where the last sasuke or adult sasuke beats him low-mid diff.
That doesn't make any sense. Take it from me as a devout Sasuke fan who loves Sasuke for his character and his power.
Naruto is more powerful post VoTE. All bias aside.
All you have to do is look at it completely objectively to understand the power difference.
Naruto had Half Kurama at the VoTE whereas Sasuke had the Bijuu's and his Rin'negan. They stalemated.
Naruto lost nothing and gained Full Kurama (giving him the ability to take in more nature energy should he wish on top of many other things) whereas Sasuke lost the Bijuu's and access to his Bijuu Susano'o but presumably gained a mastered Rin'negan.
Nothing in the Rin'negan's arsenal can match the durability given by a larger, stronger Full Kurama Ashura Avatar that Naruto has and Sasuke's full power just like Madara will always be his PS in any form since that's the only technique that can go toe to toe with his avatar.
Even if Sasuke had his Bijuu PS and Indra's Arrow, now that Naruto has full Kurama, he has enough chakra to completely overpower Indra's arrow by virtue of Kurama having more chakra and taking in more nature energy than the final VoTE fight.
This isn't even accounting for master of the Bijuu's chakra, TSB's, Onmyoudon and mastery of Yin-Yang release (CoAT) that he showed when he created Kakashi a new eye.
It's the same concept as Madara vs Hashirama.
Without Bijuu's involved, Hashirama takes it no more than mid difficulty. With Bijuu's involved on the eye's side, it goes to extreme difficulty.