Ah I thought it was an honest question from the original post asking experiences with tube amps and solid-state. I can see from the line of questioning now that the OP wants to generate a good discussion, with a slight bent on disproving that tube amps automatically sound better.
GC could use another tubes vs SS thread from time to time. All good but excuse me if I stick to tube amps if preference is asked (I guess no one's really asking). BTW, blind listening tests are moot in this case, and the Kia vs Mercedes analogy doesn't really hold water. In my opinion, and your mileage may vary.
Are we looking to psychologiocal tests now for more proof?