pcutt;

Good question. The question might have more easily answered several years ago. But each maker has been evolving to the point where their instruments can be tuned to a tone and pitch. It's remarkable stuff.

For example, in the old days, Rainsong was reported as chime-like, but the newer Rainsongs approximate the sound you might get from a traditional wooden instrument, and do it better with more clarity and consistency. I have a Rainsong Parlor nylon string that comes very close to the sound produced by a classical wooden instrument.

I think it's very difficult to pick a CF guitar on the basis of any particular tonal or projection quality. They are all good and they all are producing a variety of sound. That's just my opinion and others may differ.