After some time, with fresh ears, I again very carefully, attentively and with great interest listened to all we have recorded here and also reflected the real sound of the instruments in the room ...
First I thought , I will not share my impressions at all (as suggested by Mr.Bcgood), but in the end, why not

So I may share it, if it is of some interest for someone.
As we all know, all the three preamps sound simply great and I would not hesitate to use any of them and be happy.
If we want to distinguish among them, of course, we are talking about very subtle dimensions of sound (as always

From that point of view, I somehow perceived quite consistent picture and differences from all the material we made after listening to it few times β¦
When I compared Gordon with SMP-2 on all the sources, there was definitely a sound difference between the two. From one point of view - Gordon seemed, as if, to capture a bit more of the room, which may be called "more realistic", from the other point of view, it sounded consistently as if a bit thinner or "drier" (and also a tiny bit "sharper") than SMP-2. As if SMP-2 had a bit more "aura", direct focus, "life juice" or "air" around all it captures (be it voice or instrument). I cannot say it for violin, flute etc. from obvious reasons, but when I have my head and ears above the huge monochord with microphones placed at the same level and playing it, I would say the instrument does have that "extra juice" and focused power in reality.
After more listening, I somehow got an impression that I would not just simply say I heard MORE ROOM through Gordon as something that was added (as people usually report) , but I would rather say , I heard MORE ROOM with Gordon, because it somehow lacked something a bit from the immediate nearfield focus as if, so in what remained, the "room" was more apparent. I actually heard the SAME room in SMP-2 samples, but the overall sound included more of the organic immediate focused fullness as well , so comparing to Gordon, the room sound could be seemingly less apparent - but it was not less of it there, it was just a part of a fuller picture as if β¦
So, which attitude and sound result to prefer, may be a question of personal taste. We are deciding between Audi or BMW ...
Thermionic Earlybird - it is a bit different animal β¦ a kind of first class sweet delicacy from high end master store. It does not have that natural space, fullness and depth as SMP-2 or Gordon do , but has an extra bit of very aristocratic velvet warmth and sweeteness (but not too much). Great, wherever one feels to add that kind of decent touch and sweet odour

For me the very best tube preamp I tried so far (and I tried them quite a lot).
It may not take long before I will get the opportunity to try the new Pueblo preamp (that was already discussed here). I am very curious and look forward to it ...