No experience with the CC, also. But I have and still use the GX and GL. This is my take. I like the feel of the bigger GL, it is slightly heavier and bigger. The GX feels a bit cramped and too light handheld (caveat: I like the feel of super heavy Zorki's 🙂 ). My guess is I would not like the CC as much being lighter and smaller. As far as lenses and IQ are concern, my uneducated experience would rate the GX as having a better nicer color and sharpness, not to say the GL is a slouch in this department. Both produces sharp and contrasty image. Differences between 35 and 40mm is not huge and I like the perspective from 40mm FL anyway. I had wanted to sell both to fund a Leica, but the advise of the good folks here help me decide against it. Now, I have BW film in GL (for the ISO 1600 most of the time) and color in the GX.
I think f16sunshine has experience using both CC and GX and I would seriously consider to his advise.