Guilocorona,
said;
"Hence 2 well broken in CDPs should be in the same system, fed into identically broken in inputs of the pre, connected with identical and equally broken in ICs, and fed by identical power cords. Ideally, the two devices may be best set side-by-side on a rack, rather than on different shelves."
I don't agree with your way for comparisions, it's flawed, way to many other variables.
said;
"Hence 2 well broken in CDPs should be in the same system, fed into identically broken in inputs of the pre, connected with identical and equally broken in ICs, and fed by identical power cords. Ideally, the two devices may be best set side-by-side on a rack, rather than on different shelves."
I don't agree with your way for comparisions, it's flawed, way to many other variables.