I like the watch analogy. There's just one difference to keep in mind. I think that even watch aficionados will acknowledge that expensive mechanical timepieces are not as accurate or reliable as a cheap modern digital watch. Whereas, there is a mystique surrounding Stradivarius that somehow, he was able to produce a quality of sound that nobody else has been able to capture. Maybe, "back in the day", his instruments were superior to his contemporaries' products. But it seems that is no longer true - if indeed, it ever was.