I'm not a pro but have played for 38 years on and off - and when I was practicing 3-4 hours per day, I was pretty good. I've managed to accumulate about 20 very collectible, pristine horns in my search for the perfect fit for me. I've found quite a bit of discernible difference in a few of them, mild differences in others, and then there are others that I can't tell apart from each other blindfolded. The 2-3 that I've settled on as the best * for me * are easy to recognize by both sound and feel - I would know them even if I couldn't see them. Yes, i sound like "me" on all of them, but a differently shaded version of me on many of them. I imagine that a top flight player who can coax almost any sound out of a horn would recognize even bigger differences than I do.