At first glance they both look like females to me. My year old female has a knob about the same size as both of them. Since your second one looks like its mixed with something else, its hard to say for sure that its a female. Being a cross breed could have made the knob smaller. I'd still say female though.
The marks on the second one's bill were there when we got them it looked like marking on it that should be there now it is starting to come off. Also this one had been starting to attack the roosters through the wire, but only when they crow during the day. So this may be why it markings/maybe scabbs are comming off. I have had them for around 3 months