Yeah, I've found that the black coatings seem to vary a bit too.
For example, on my BO Kick, Fuse and Blast, the finish is sort of "powdery" and is likely to scratch off pretty easily. Whereas, I have a BO Mini, where the finish is more like a glossy painted finish, and seems much more durable. It resembles the DLC coating on the Skeletool CX more than the BO on most LM tools. The finish on the 20th Anniversary Wave is more like the Mini too (although mine has apparently had a hard life and worn off anyway)!