I don't know that I would characterize the C2 as the 'premium' version of the 6P and Z2. It's true that the latter two lights, sadly, never came out in a version with HA III anodizing. I think that supposedly the 6P, coming out first, was intended as a 'cop light', so the type II black anodizing was intended to visually match a cop's patent black leather duty belt and accoutrements. Someone on this forum years ago claimed that the wall thickness of the Z2 was actually thicker than the flat panel sections of the C2. Also, for a few years (and don't ask me to name those years), both the FBI and the Air Marshal service issued the Z2 to their armed agents.