1) no, and
The topic of this (ancient) thread is the sound of different tubes, and respondents' enjoyment or lack thereof of various tubes in the specified equipment. The topic is not about objectively measuring anything. (Almost) everyone posting here clearly believes that they hear very significant differences in different tubes (I know I do), and I doubt that all of us are wrong. We enjoy sharing our impressions with other enthusiasts who feel similarly. No one posting here except you cares one whit about objectively measuring parameters that some people may or may not think are important. We have our systems because we enjoy them, not because we want to measure them.
The human auditory system has evolved over hundreds of millions of years, and it's pretty much a sure thing we will never completely understand it. Who knows what makes music sound "good" or "real?" We'll be asking and attempting to answer those questions for many years to come.
So please mmrkaic, and I say this sincerely. Sit back, chill, maybe get a drink, and just enjoy the music.