Well, it seems that there are three parts to your question,
For the Mach 1,it's a great knife, guess it's maybe just that most of us are spoiled for the wave, and the if asked to choose between the Mach 1 and the Commander, the more popular choice would be the Commander, due to it coming to us with a Wave®...thus it basically boils down to consumer choice and preference...in a word, it's just the Wave®
For the Raven, some people seem to prefer G-10 over Krydron, and thus many of them would usually go for the other models in the line...EKI seems to have addressed this issue with the addition of the Blackbird to the production knife line...it's basically a raven, but with G-10 handles...
For the Specwar, it's situation is pretty much the same as the Mach 1-Commander issue...Many of us would prefer to have something with a Wave®, and in that case, the SOCFK fits in to position...it's basically a Waved [CQC7-Specwar] combination...again, this can be attributed to the Wave®
Guess it's mainly the preference of people to have a waved knife that makes the difference...
