I think Vitto is totally fine. She might only have 2 rtw campaigns but she was busy enough shooting as she has some big things under her belt: beauty campaign for Chanel, a new fragrance campaign for Tiffany by Meisel (who is still one of the greatest supporter of vitto), major Vogue covers (Paris, US, Japanx3). Kiki has more rtw campaigns and has been more consistent in that, but if you look at the whole thing she lacks some things that vittoria is doing, especially covers. Vitto's the muse of Luigi and Iango, she's supported by the most powerful casting directors (Piergiorgio and Ashley), she's loved by big photographers.. I think she will not fade anytime soon. And Kiki will not fade either, as she is supported by all the big names too. They are just developing two different kinds of careers, with Vittoria being more popular with the public (she's really loved by many people, just look at instagram ) and Kiki being more quiet, more the mysterious high fashion model (which is great)