I owned the cornscala C version a few years ago. While it is a good speaker, it came with it's own set of problems. First, the crites xovers had to go and were replaced by an ALK version with adjustable taps for the mids. I also wrapped the midrange horn with dynamat. Even after all this the undoing of this speaker for me was the cabinet resonance in the mid bass. Not terrible, but undeniable in some material.
The bottom line is that although much more expensive, the CW IV is the better speaker.
The bottom line is that although much more expensive, the CW IV is the better speaker.