Nature Energy boost all of Naruto's stats, Bijuu Chakra boosts all of Naruto's stats, Regular Chakra being absorbed boosts all of Sasuke's and Kaguya's stats when they were fatigued etc etc.
I'm no expert but nature energy directly enhances the muscles and senses of the user, that's what senjutsu does, the bijuu cloak increases Naruto's stats, one can enhance something with chakra and that's shown by visible chakra surrounding that object. Chakra isn't just energy, it's a life force. Someone can die from draining themselves.
It's best to guage stats through jutsu or shown physicals and not chakra as Sasuke doesn't have anymore chakra in the Susanoo than he does in base. He expends more but you won't see him going into a fist fight with Naruto in Kurama's avatar. I mean what's the difference between Susanoo and normal Sasuke if it's the same chakra hence stats?
Ten tails did nothing more than scorch itself with it's bomb, Madara absobs it, black Zetsu pierces him with his hand, black Zetsu's hand>Madara and Ten tails combined..........