There likely won't be too many people that have heard both amps, as there were only approx. 10 pairs of CCQ produced to my knowledge. Mine are #17 and 18, and were produced a year ago. As the model is now discontinued - CCQs will be hard to find.
I actually have heard both amps in my system, though not on the same day. Keep in mind that any comments are specific to my experience with my Verity Parsifals.
They are quite different amps despite inexplicably having similar names. The sound, tube complements, aesthetics - everything is different. I'd be curious to know why they share a name.
The CC80 is an excellent sounding amp, with that flow that Shindo is known for, and a nice top-to-bottom coherence. However, it has FAR less juice than the CCQ - CC80s can sound a bit stressed under the same load that CCQ's handle with grace. CCQ's have this uncanny ability to sound almost SET-like when playing low-level music, and yet they come ALIVE when the music gets more complex. By comparison, the CC80s sound a bit compressed to me, a little less "glowing" on low-level music and a little less exciting on more dynamic passages. As would be expected from an amp putting out half the power with new-production KT88's (as compared to the CCQ and its NOS EL-34's).
Sonically, the biggest difference is that the CCQs are richer sounding and a bit more "right". It's very much like the difference between a Monbrison and a Giscours: the CC80 is excellent in its own right, but the CCQ is better. To my ears.
As to Shindo SET - I haven't heard any, due to preferring speakers requiring more power. If I had your speakers, I'd certainly consider the D'Yquems though, but it can be hard to find ways to audition Shindo amps properly.
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