Board Thread:Theories and Speculation/@comment-25139119-20150522183055/@comment-25549954-20150522195459

Kurama Mode and Tailed Beast mode are the same thing, the Jinchuriki have access to transform into full beast Kurama replica and have slit pupil and can use Tailed Beast Ball. Minato was in chakra mode but was also able to access that mode during the war he had slit pupil and transformed into full Kurama, see this image.