I'm a woman with extra wide feet. I have and love my Bikilas, which are the men's size 40. I was thinking of picking up another pair of VFF for the gym and possibily just regular shoes if I dare! My Bikilas are skin tight, and so I was thinking to maybe try the women's 41 size, but am worried they might be too narrow. Does anyone know how the men's and women's models differ? It is just length, or are the women's shoes narrower?