And who would the most appropriate subject of an ABX test be? IOW, how many ss guys care about similarity vs how many tube guys care. Ime, the ss guys only want it to sound good while the tube guys want a distinct characteristic sound. Another pertinent question could be, how many tube guys agree to be ABX tested vs how many ss guys agree; strictly for the purpose of distinguishing tube from ss.
I have a great pair of W5-M monos with matching pres and a pair of Electrohome 7189 monos that sound really good. But I also have a GAS500, two pairs of LSR&D Superamp monos, and two Leach 125wpch stereo amps that imo surpass the tubes in sq. Not to mention the huge power differences. But like I mentioned earlier, ime the ss need to be cranked to really perform while the tubes do not. And I truly believe that's where the apples to apples comparison lives.