They both can supposedly control the Full juubi
They both have the rinnegan + Its techniques
They both have yin-yang release
They can both manipulate bijuu
They are both the strongest shinobi in the manga so far
The Creation of all things has limits....it failed against the juubi.
One can create the moon, the other can summon meteors
One can seal souls, The other can defy his soul being removed
Anything am missing?