Blancpain Fifty Fathoms Flyback Chrono (SS) Vs Cartier Calibre Diver (rose gold)

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I’ve been debating between the FF Flyback Chrono SS and Cartier Diver in all gold. I know it might not seem like an apples to apples comparison given one is SS and other one is gold. One can argue that FF is decidedly an amazing tool watch with great complication. However, reality is I’m not planning to use either of these watches for diving. I see that Cartier discontinued Calibre diver series. Not sure what that would mean in the long run for the gold diver? Also, I would like this watch to be one my everyday watches. My current collection includes: Rolex Sub (SS) and IWC Portofino Chrono (rose gold). IWC is an occasional watch. I’m also debating maybe Rolex Yachtmaster II (SS). I would really appreciate your thoughts on this. Here are the photos of the watches.