Glory, Thanks for your question.
I have never played them head to head on the same turntable. When the ZYX is down, the XX-2 goes on the Amazon and Schroeder, otherwise it stays on the Rega9. I am not a very good A/B guy. The XX-2 did a beautiful job on the Amazon and Schroeder, very similar sound as the ZYX line, nice and honest. The XX-2 just can't reach as far as the ZYX. There is an open, relaxed clarity with these two manufacturers. You don't think of adjectives like warm or liquid. You just focus on the music. If its good music, you are grooving. If the lp or the recording is not so hot, you get up and pull the record. When you hear the music through the ZYX, you hear things so much more clearly. Background passages or riffs from familiar (and old) lps are suddenly there. You are not sure that you knew they existed. It is amazing how much information is masked out by the noise floor
Of course the rest of your system has to be there to let the Z sing.
Did I even answer your question?