Pakman, I don't believe there is a single thread listing, comparing and discussing all the features of all the CCRs out there. Would be a rather big project. Furthermore it's hard to find a single person being neutral, fair and well versed enough to do the comparison without causing nasty fights.
People tend to be very protective of the units they dive.
Ron Micjan has a
comparison chart on his website, as well as teardowns of several units. His Ouroboros and MK-5p teardowns are also in our library (if not they will be as we're rebuilding it).
Also featured there are the Meg, Evolution, PRISM, KISS, a good source for info.