Source: Werelist

A mythic is a person who feels, similar to a were, that they have some connection to, or identity of, a creature other than human.

The difference is that a mythic feels that their "phenotype" is of a creature of myth or legend, such as a dragon, gryphon, or manticore.

There are many longtime members of the community who fall into the mythic category. While there are certainly some differences between someone who feels they are a lion, and someone who feels they are a dragon, there are also many similarities of experience. Both people feel that mentally or spiritually, they are at least partly non-human. Both kinds of people may experience mental shifts, experience visions related to their therianthropy, etc.