Are you saying that you attribute the very flat sound lacking vibrance to the Transparent cables and not to anything else in the system like set up, room, or gear? How did you reach this conclusion?
You are also comparing the sound of two different cable brands in different systems and different rooms? I would not be confident in my own ability to sort the cable contributions to those of the rest of the system and room. Was the music and volume the same? These anecdotes do not really convince me that the tactile palpability which you describe is a characteristic of one cable and not the other or of something else entirely. My all Transparent cable system has a very good sense of tactile palpability, presences and believability, in my opinion of course, but also in that of a few friends who have heard it. I found this quality was much more the result of Jim Smith voicing my system to my room than it was with my particular cable brand.
From everything that I have read, the MasterBuilt cables are excellent. I would be interested in hearing from anyone who had done a direct comparison of one brand to the other in the same system with the same music and then a description of sonic differences they heard.