The pics are fine as they are, it's just a matter of the fact that they're still only 2" long, and their bristles aren't fully developed. So sexing them based on their bristles, is sketchy at best (aside from obvious males with lots of mid head whisker growth).
Right now, I would say regular female, albino male. But 6 months from now, the supposed female may very well get a bushier mustache of her own and turn out to be male after all.
I had a regular bristlenose which I purchased from the LFS as a "female", that was about 2" long. That was around 8 months ago. "She" is now a "he", with a nice bushy nose that puts my old 5" male bristlenose to shame!