It is not a big surprise. A few months after the presentation of the Chronograph Historiques Cornes de Vache 1955 in platinum that I described in this article , Vacheron Constantin unveiled a pink gold version. I will not describe with details this watch ...
it has got the same diameter as Patek's 5170 and the shares the same thinness but while the 5170 looks a it "bloated" due to Patek's effort to make the 5170 look bigger or more elegant with the (overly) slim bezel, this VC CdV is by far more balanced look...
I do think the bezel and lug proportions of the VC are much better than on the 5170 The 5170 remains a very nice watch, through, with a more modern, upgraded movement. The plain baton hands need to change, however.
It will be a matter of taste and budget. With a 30% more important ticket, the platinum is madly priced. While the rose gold is in the ( high ) average budget. You are right, the rose gold is more retro looking, while the platinum is more " polyvalent ". ...
the price is more reasonable and accessible and the look is a lot warmer and retains some of the vintage charm of the predecessor. Thanks for the fantastic photos and review Fx! Cheers Robin