I can't imagine anyone considering the Kotke disc "hi rez" ; it sounds terrible.
I feel I have to take what you you say at face value but I have no way to explain it; I've always found CD sound to vary a great deal and this hasn't changed as I've upgraded my system. For example, last Fall, I upgraded my integrated to a Hegel H390 and this improved resolution enormously. I still get rid of some discs because they are too bright; others because they are too dull.
I'm expecting to take delivery of a new Jay's transport this Friday but the last thing I'd expect would be that it would make all CDs sound equally good. If it does, I'll be very shocked and will definitely report it.