You look like sisters, but not like twins! Don't take too much stock in that. When I was a nanny, people would ask me if my "daughters" were twins. Well, A) they weren't my daughters. I was Ad's babysitter, and Gi was a school friend of hers I also took care of a couple days a week
B) Neither of them looked like me
C) Gi is Portuguese, and looked every inch of it - petite, delicate features, long, thick black curly hair, dark olive skin, very dark brown eyes ... Ad, although the same age, is of German/Polish, etc. descent - was 4-5 inches taller, short, light brown hair - barely enough to brush, green eyes, broad cheekbones, and very fair skin ...

and yet people repeatedly asked "are they twins?" in all seriousness!

You guys do look like sisters, there's no denying that.