Too bad we cant meet, otherwise i would bet you you wouldnt be able to tell which is which if you didnt know beforehand
. Unless the BTR7 intentionally colors the sound like the ifi blu does.
If we could meet, I wouldn't mind doing the blind test with BTR7 at all, I would be much more interested in exchanging opinions on our equipment, trying equipment I don't have, discovering new music I don't know, etc
Coming to the point, I personally believe that most of the sonic differences we perceive are due more to the transducers than to the amps/DACs (psychoacoustic considerations aside).
However, I think that some sonic differences exist between the various electronics.
I don't think BTR7 intentionally 'colours' the music (it doesn't have xbass filters or similar), I believe that the 'colour' that differentiates the sound performance of some DAC/AMPs is due to the differences between the power supply and amplification/filter circuits .
Then there are some sonic differences due to the different DACs and their circuit implementation, differences that become more evident with R2R DACs for example.
Anyway,
a blind test, well done so as to be scientifically valid, I have actually never performed it with BTR7 - 5K.
Maybe I will
(I have little time available unfortunately).
I made some comparisons between RU6(NOS)-RU7(dsd256)-GOLD-BAR(BP), and, using resolving IEMs (EA1000 for example) and modern quality recordings,
I can hear the sonic differences between the various devices.
But all this has nothing to do with the 5K - BTR7 comparison.