What's the point of Unarmed Master

By Darck Child, in Only War Rules Questions

Unarmed Master seems identical to Unarmed Warrior, did I miss something?

Never mind I figured it out Unarmed Warrior removes the Primitive Weapon restriction. right?

Yes. With Unarmed Master you count as having Deadly Natural Weapons trait that removes Primitive (7) special quality from your unarmed attacks.