Right on. Once you spend enough time around reps - wearing them and using them ... and around rep forums - reading detailed reviews and viewing even studying endless macro photos ... and then still find yourself buying the genuine article, aesthetically it's for the little things, not the blatant. It's in the minor, yet pleasing details. And also, as you mention, for the things unseen yet appreciated that are hidden inside the case.
I bought my wife a genuine Datejust last year. Oyster bracelet, smooth bezel, white dial with Roman numerals. The bracelet is dainty and silky smooth at every joint - probably lighter (not heavier) than the rep. There are no sharp edges on the clasp, and the clasp is neither too tight nor too loose. And it fits like a glove between the lugs. The power reserve is impressive, and it winds smoothly, effortlessly, and with no discernible noise. The dial print is precise and crisp, but not overstated. Yes... MINOR differences from Josh's $200 version. All the difference in the world to me, however, and yet I am also quite aware that the run of the mill person off the street would never understand or even be able to notice these things if shown side by side. But I just don't care. Maybe it sounds snobby... but it's not. The few gens I've owned over the years, I may have never owned if not for the rep versions which only heightened by appreciation in the first place.