Yes, I really love both and they just have a slightly different flavor. I think Alan Smart intended the C1 to be more like the Quad buss compressor from an SSL, and the C2 is his idea of how to improve on that sound. Both great.
I find the C2 to be more "modern" sounding... but I know that's a tough subjective call, but given what you're looking for, that would be my recommendation.
It's one of my favorite compressors, very punchy and puts a sort of sparkle on things... but a little goes a long way. I was shocked how little the needle moves compared to how hard it works (in a good way).
Not sure where you are, but if you're in the L.A. area, I'm happy to let you borrow or try mine.
Hope that's somewhat helpful.
-Andrews Jenkins