I think I remember reading from Hye's blog along time ago (she used to always walk for Lagerfeld and once or twice Chanel but never Fendi) that for Fendi, the stylist have a lot more input and unless Karl really really likes you, the model casting is different. Thats why we havent seen like Jourdan, Liu Wen, Han do Fendi, but show up in Chanel and Lagerfeld regularly.
She's killin Milan though.