I have both Gens and reps. Gens include Rollie's, Blancpain, IWC's. Yet, I wear both. Just for the variety. Sometimes I prefer the reps (Pam's). I refuse to pay for a Pam or Rollie Gen anymore. Too many nice reps of them.
Sometimes, I pick one out of the box and wear it without even realizing which is gen and which is rep. For me, it's hard to tell on the wrist anymore......and mine keep good time. Maybe, my eyesight is going.......or maybe I'm not as anal as I could be......or maybe, nobody else would ever know besides me.......and I forget!
I just love watches! my Addiction no.12.