Were the photo's taken at an odd angle? The body shape doesn't look right for a normal ram, but more like a 'balloon ram' due to the height of the body.
A way to sex them is to look at their stomachs, females have a pinkish area where males dont, pretty sure this method is correct, though someone with more experience with rams might be better able to help.
EDIT:'A sure fire way of sexing your Rams is to check the black blotch in the fish's side. If there are blue spangled dots in and around it, that's a female. Those with no dots present are males.' Don't know how true this is but taken from an article on another website about rams LINK