As you know, Cartier unveiled at the latest SIHH two Carbon watches: the Santos and the Ballon Bleu.
I will be frank with you: I much prefer the Santos due to its shape and design.
The Ballon Bleu is pretty nice too, I would say nicer than expected. This "black" atmosphere gives a lot of originality to the pebble shaped watch. But I don't change my mind. The Santos is my fav one!

Fx