Okay I've know this has been done before. But I didn't know where that one ended up so. Here's a new one. Hope this doesn't pisses people off. So here's my theory.
Full Size Nibi vs 4 Tails Kyuubi = Undeterminable
My reasons is because not only do we not know what the Nibi can do. But also that people thought WRONG about how strong a 4 tail kyuubi is.
Kyuubi is the strongest and with unlimited chakra. what is 4/9 of unlimited chakra? there is no such thing. so the number of tails REPRESENTS the mental stability of Naruto's mind. How much he can control himself. His chakra is always the same in Kyuubi form. There is no way he can gush out 4/9 of kyuubi's power. Bijuu are known for immense chakra, if 4/9 of Kyuubi's power were shooting out, he'll be dead. So only an big amount of chakra that was high enough and hot enough to boil Naruto's skin off and form that 4-tails. It's compressed chakra so that's why Orochimaru couldn't pierce through it.
People always say the more tails you have the strong you are. That is true, BUT it was said about each bijuu. It was never told that Naruto gets to release a fraction of his power more. It was always about his mental stability.
I'll use Gaara vs Deidara as an example. Gaara had use his chakra power over sand and protected the ENTIRE village from Deidara's bomb. AND he still has power running and kicking. Do you really think so little of Nibi just cause you know Naruto has unlimited chakra?
And Kisame has THE largest chakra supply within Akatsuki. HOW MANY OF YOU PEOPLE think Kisame is THE strongest. Tell me. Chakra supply doesn't matter, it is about the skill of the ninja. And we don't think Naruto is the most skilled ninja alive now do we?
The points I tried to make:
- Number of Tails Naruto Represents Losing His Mental Stability.
- No Matter How High A Person's Chakra Is, He Won't Be Using It All At Once.
- How High The Chakra Supply Doesn't Matter, It's About The Skill Of The Ninja.