Board Thread:Naruto Discussions/@comment-26866422-20160407171305/@comment-2005101-20160412185949

The way I saw it, simply awakening the Mangekyō Sharingan affords the dōjutsu's base abilities more power due to the change in their chakra. Thus, while Madara and Obito only needed the regular ol' Sharingan to subjugate Kurama, it was only possible because they awakened to the power of the Mangekyō Sharingan.

Sasuke's subjugation of Manda, was said to be a glimpse of the Sharingan's potential to control Bijū.