RSM is just a higher level of BSM, in the end of the day it requires the body being used to bijuu chakra and NE which Naruto's body has been used to since way before his Rikudou power up.
In addition, Sasuke doesn't have understanding of all things which means he needs time to learn how to use his dojutsu, it's why he couldn't even figure out how to leave Kaguya's dimension when he was trapped.
Naruto was running out of chakra while Sasuke was inexperienced, they were both equally disadvantaged. No point giving excuses of who was most nerfed.
RSM is higher form of BSM?? Don't make me laugh..
It's definitely not that simple
If it were that simple, one can also say the Rinnegan is just a higher form of EMS
When Naruto saved Gai he was in RSM and clearly wasn't using any Bijuu chakra
RSM is independent of the bijuu and it's mechanics are different from Toad SM
Naruto's body was prepared for RSM. Okay
But Sasuke's eyes weren't prepared for the Rinnegan
Sasuke has used ocular powers for as long if not longer than Naruto has used bodily powers
Comprehension of all things.. Funny you bring that up
Naruto has comprehension of all things yet he didn't know he could fly, didn't know how to use TSB properly, didn't understand how Kaguya's dimensions worked.
So that's a none factor. Unless it's categorically stated that he's using, he's not
So once again, Naruto was exhausted and inexperienced
Sasuke was inexperienced
They were not equally disadvantaged, Naruto was more disadvantaged