Interesting post & doesn't surprise me. I suspect Wilson made some advances in vibe control from the X1 => X2's...hence your different results...
I continue to find that vibration control is a major influence on superior sound. Even in cables and power. It's shocking just moving my Shunyata Typhon off my rack to the floor...it's like I broke my system...
Thanks for that...do you dampen/isolate your cables? Particularly your (new!) Opus MM2 SCs?