Depends if juubi has jin. Or not
If it does then jububi win
If not the bijuu wins
Cause remember there just natural energy without a jin. They can't think well enough on there own to use there full power
The 9 bijuus. Idk. I thought the manga Naruto was teaching us that with friends and numbers on your side (and ninja cunning), there is no power too great to beat. ... or something corny like that.