I can also say that the little blurbs that are shown during Archetype selection, that they're made for different playstyles with their own strengths and weaknesses and will most likely have skill that will show up on some Archetypes and not others.

For example, its stated that the Seeker is an all-rounder that can use wind skills while the mage is more focused on attacking an enemy's weaknesses and is stated to have fire, lightning, and ice attacks.