As far as I know, the last for the Women's CP's is not the same as the mens. I remember reading an article when they first launched the Women's collection and they mentioned how they went and developed all different lasts to fit a woman's foot. With that said, they don't appear to be extremely different or anything, I think the men's is just slightly wider and less almond shaped in the toe area.
Hmm... odd. I bought a pair of the women's achilles and they fit the same as my men's 39... Maybe the lasts are different for other shoes, but the achilles was exactly the same.