When choosing a metal for the watch, the first thing that comes to my mind is the skin tone of the wearer. If you are caucasian, I would suggest white gold. If you are tanned, Malay or Filipino, I would suggest rose gold as it will blend well with your skin tone. If you are Chinese, I would go for yellow or white gold. I assume you have tried on both the watches because Breguet's straight lugs would make either watch wear quite large.