I just bought some men's Ariats Heritage III lace paddocks 2 months ago. I'm also a women's 9-9.5 and I picked up a men's 7 and they fit great!
But ... I typically wear men's boots over the women's (not just riding) because I have pretty wide feet and find that a normal men's width fits me very well, where as the women's sizes tend to be a bit more narrow.
They're a good boot and I definitely love mine.