Theory: Having Kurama on your side is better than having the Juubi.

[Sage6paths]

Kurama is a chakra-formed beasts with the ability to think like a human. Whereas the Juubi is all-powerful but cant do anything by itself except following the commands of its master.

Thus for Naruto to have the 9 Tails is probably better than the Sage of the 6 Paths having the 10 Tails?

 

[Snape Uchiha]

We don't know for sure that the Juubi needs someone controlling it. Madara and Obito are just controlling it to make it as effective as posssible. It makes the mostsense to say that it can think just like any other biiju.

 

[LegendaryAce]

...have fanboys been decieved so much by the incomplete juubi to actually think 1-9 mixed together with op techs and eyes and everything mixed into a sage is better than Naruto having half a 9tails please think about what you're saying and do rethink your thread ... Regardless if the juubi can't think it doesn't matter aslong and its under the user's will ... So6p having juubi Is better than Naruto having half a kyubi

 

[MickNerks]

The juubi is stronger then kurama. The only benificial thing about kurama is that he is willingly sharing his chakra with naruto. Obito and Madara have to force/control the juubi to access its powers.

 

[TaBaYo]

Obito and Madara are not Jinchurikis like s06p and naruto. They are forcefully controllinf Juubi from out. The s06p had the juubi in him like naruto has kyuubi and with that s06p is OP and juubi is more beneficial in that case.
Rememba the seal that naruto used to bind kurama during kyuubi chakara extraction....Kurama said it was for the s06p. I think only s06p and naruto are able to use that seal, thus can seal somefyn like the kyuubi or juubi in them.....just a thought.