Perhaps there is something that I am misunderstanding. ..
In consideration to the relevancy of a listening environments role in the overall performance of a given loudspeaker system, any audition held within a three dimensional space that feature interior design elements which deviate from the specific layout of your own listening area, will yield results unique to its own acoustical properties and room modes. One should expect a perceivable contrast in performance if the same set of speakers are to be tested in areas that present a significant variance in dimension....
So i guess the part I'm failing to grasp is how one would formulate an educated decision that proves to remain valid once the application of the speaker system is transfered from one dedicated space to another.
IMHO, the problem is that you are overthinking this or trying to make an issue out of a simple matter. I'd rather think that you are overthinking...My personal experience from having purchased 5 PSB speakers (HT and Music) that I compared in the same dealer room against Paradigm, Infinity, and Energy is that they will sound somewhat different, unless you replicate the auditioning room, but the differences between speakers are still there, and very similar differences to what I heard in the auditioning room. For example, besides comparing brands, at first I was considering purchasing bookshelf (PSB B25) or tower (PSB T45). I ended up buying both, as to use the towers for mains and the bookshelfs for surround. At the dealer the B25 sounded somewhat boomy and bass not as controlled as the T45, the midrange was slightly better than the T45, and highs were basically the same. Overall, the T45 was a better speaker, because it was more controlled and had the right amount of bass for my tastes. When I got them home, did the same, and because of room conditions the sound was brighter, bass was augmented, and mids stayed about the same. The same results, but with a slightly different sound, was obtained in my room as in the dealer, my opinions of one vs the other didn't change at all. Amplification came from a
Marantz SR-5001, which was the same receiver used at the dealer, bought everything together.
You can overthink it, make a long discussion about this, or feel the same. The reality is that no one is going to bring you 4-5 pairs of speakers to compare. As mentioned you audition and make an educated decision based on what you heard somewhere else. The other alternative is replicating the audition room from the dealer, as to have the speakers you purchase sound the same as when you auditioned; not very practical.