'Kin to the Other is a phrase that was coined by Jarandhel Dreamsinger as a reforming of the increasingly popular term Otherkin. The two terms are essentially equivalent, although they have somewhat different focuses.
While the term Otherkin has come to accentuate a disassociation with ones' humanity (albeit unintentionally), 'Kin to the Other was created in order to show that a connection to humanity isn't completely nonexistent within the Otherkin community.

In some places, 'Kin to the Other has come to show a sort of Holier-then-Thou attitude. However, in other places, Otherkin has come to show a general immaturity.
It's a no win situation, essentially.