I'm surprised to still see people here that think either of them lost their Rikudou chakra and respective abilities. Naruto still has Rikudou Sennin Mode and Sasuke still has his Rikudou chakra within his body like Naruto.
Naruto's RSM is based off his Rikudou chakra and Sage Mode which he both still has. The perks such as TSB and the special markings are perks from attained chakra from all nine Bijuu.
Again RSM = Rikudou chakra + Sage Mode..
On to Sasuke, he temporarily lost the tomoes in his rinnegan because of the strain it put on his chakra and rinnegan from traveling in Kaguya's dimension, he even states this in Gaiden. We clearly see that the tomoes reappeared afterwards when his Rikudou chakra and rinnegan seem to fully recover.
Tldr: Naruto still has Rikudou chakra/RSM, Sasuke still has Rikudou chakra/ 6T Rinnegan.
Naruto and Sasuke are equals..
Naruto's RSM is based off his Rikudou chakra and Sage Mode which he both still has. The perks such as TSB and the special markings are perks from attained chakra from all nine Bijuu.
Again RSM = Rikudou chakra + Sage Mode..
On to Sasuke, he temporarily lost the tomoes in his rinnegan because of the strain it put on his chakra and rinnegan from traveling in Kaguya's dimension, he even states this in Gaiden. We clearly see that the tomoes reappeared afterwards when his Rikudou chakra and rinnegan seem to fully recover.
Tldr: Naruto still has Rikudou chakra/RSM, Sasuke still has Rikudou chakra/ 6T Rinnegan.
Naruto and Sasuke are equals..