Miyajima started out to build a superior mono cartridge. After he reached his goal, which led to his rather unique structure, he then branched into stereo. I am not aware of whatever may be unique in the design and/or build of ZYX cartridges, but I've heard the first version of the UNI, and I loved it, still kind of lust for one. If the UNI II is so much better as claimed, I'd have to hear that to believe it. Anyway, suffice to say that I cannot think of a single cartridge maker who cannot make a case for the unique-ness of his products and their aural superiority. It's called "marketing", but also it's because these are creative people who have put in time and effort to think about the art of phono transduction.
