El34 = KT88 = KT120
I hope you are kidding … if not, go see a specialist.
Miniscle nuances,= same
To you, I guess so ... I have no reason to believe you are anything but truthful and I am not suggesting you are not.
Where you go off track is assuming the rest of us have the same inability to hear the differences when the differences are quite blatant to myself and a few others on this forum.
Honestly, I thought you were joking when I first saw your comments.