Thanks for the info.Thanks for the question.
All the research we have done on trumpets and mouthpieces has been empirical, not theoretical. Whatever question there has been on anything; we have physically created the situation on several instruments to discover the answer. As far as gloves are concerned, we checked those out with many players and instruments in 2001 and found that wearing gloves changed the sound in all cases.
For what it is worth, we found the same type of difference in comparing instruments with pearl or plastic finger buttons to the same instruments with one-piece metal finger buttons. The holding position of your left hand and the amount you squeeze the trumpet also has an effect (I showed this one to a new customer just this past Saturday).
I could continue with every design decision that was made in the development of our trumpets; however, suffice it to say that everything you do to the instrument or the player affects the way the instrument plays.
So, to answer your question, the way for you to understand the difference is to carefully, in a controlled room, with very perceptive listeners, do the experiment yourself.