Sasuke can't go into Senjutsu mode without Juugo at all. Sasuke can't go into his Bijuu Susano mode anymore.
Naruto however can still use the Bijuu KKG element and techniques.
Wouldn't that be the same thing for Naruto borrowing KKG elements of the bijuus? I mean he cannot just take them out of nowhere unless they give them their chakra as they are not his Jin.
He has to go RSM and basically do the whole "can I borrow your power?" like he had done with Goku when they were battling the Juubi and Obito and Madara.
This also goes in line with your logic of separating Kurama into 2 different entities. They have their own consciousness and they aren't tied with Naruto much like how Juugo isn't tied with Sasuke.
Orochimaru would be like Kurama and Juugo would be the other 8 tail beasts.
The 8 beasts aren't really applicable here.
We only ever see Naruto really using Kurama. Which means he cannot use the powers of the other beasts, otherwise we would have seen many techs being used. In fact, we only ever see the bijuu affinity infused Rasenshuriken 3x throughout the series (against Madara, Kaguya and Delta).
So least to say that he cannot use them whenever and it is not a true "hand-me-down" power. It comes and goes. (Naruto would've used them against Momoshiki had it been a true powerup).
Of course, you could say "Momoshiki took all of the bijuus away"
Which is true. Which means his bijuu Rasenshurikens against Delta was indeed his own derived from RSM. Therefore, it cannot be counted as a separate hand-me-down power.
"Can't it be that they gave him their chakra?"
Not really as it was already stated by Hagoromo that Naruto would be the meeting point. They are free themselves. Even Kurama had the ability to be free of Naruto yet he chose to stay. So should the former be true, then they are on the Juugo argument.
Meaning that Naruto doesn't really need the bijuus for their affinity (since the TSO is all affinities in one to begin with). We also see this on Toneri's RSM where he can change the properties of the TSOs.
On top of that, have I mentioned that Naruto gave them their freedom and therefore power back and that Momoshiki took all of those 8 beasts and some of Kurama's power? If not,
Then yes, Momoshiki took away 8 tailed beasts and some of Kurama's and Naruto's chakra.
We also know that separate chakra given fades away as per your argument with Juugo's chakra as well as the fact that the Juubito chakra faded away from Kakashi taking his Mangekyu and chakra pool away with it.
As for Kurama, no. IF you are counting the whole "Sasuke no longer have this and that" then do not count Kurama as 2 different entities. They merged and became one (since they were one to begin with). So IDK why you're counting him as 2 still. Yes, you can count Itachi's eyes as the same thing if that makes you happy. Although it is far more believable that they are separate powers than Kurama being split into 2.
There's really no difference in power or technique. It was simply that it has sentience. Completely different from Itachi's 2 or pseudo 3 (because susanoo needs the other 2 techniques) powers.
That is like saying every Shadow Clone of Naruto is a powerup because they have their own different personalities.
Which means:
Naruto
1) Kurama
2) RSM
Sauke
1) Itachi eyes
2) Rinnegan
3) Curse Mark (remove it or not, it still wouldn't make Naruto be greater than Sasuke in terms of hand me downs)
The rest are negligible by your standards. IDK why you're removing stuff from Sasuke's side and you're adding stuff from Naruto.
Both logic of removing and including are applicable for both sides.
all 8 beasts were removed by Momoshiki
all techs were borrowed or derived from RSM
No longer counting Kabuto's and Juugo's and Orochimaru's but counting the bijuus is outright nitpicking.
Naruto didn't really have any hand me down powers.
Majority of them was from Kurama being unsealed little by little.
The fact that he only ever had 2 techniques: Shadow Clone and Rasengan is true to the lack of hand-me-down powers argument (well 3 if you count the sexy jutsu).
I mean just list the amount of techs that Naruto has:
Shadow Clone
Rasengan
Sage Mode
Chakra Mode (Kurama's tech or maybe his own since it is from the fuinjutsu so I cannot really be accurate here)
RSM
I mean that's a really reaching of 5. The rest are just variants.
How about Sasuke?
Curse Mark
Flame (ya, I'm including the black flame into this instead of separate since I am doing variants into 1 thing only)
Lightning
Sharingan
Mangekyu
Rinnegan
So even with condensing everything, Sasuke still had more and 3 of them are handme downs (Mangekyu, CM, Rinnegan)
Naruto has RSM and CM as handme downs (if we are taking CM as a Kurama tech rather than his own ~ since we see Toneri and Mitsuki use this without Kurama and the fact that Naruto and Mitsuki use this means that Tenseigan isn't needed neither)