Equal consideration refers to a moral consideration; so in this case, women are to be included within the moral sphere in the same way that men are. For example: if a man and a woman were drowning and I could only save one, their gender would not be the defining characteristic in deciding who to save.

Equal treatment however, is different. For example, it does not follow that a feminist arguing for the woman's right to freely choose to have an abortion should then say that men should have the right to have an abortion too, just because men and women should be equal. Men and women are not the same and so it is necessary for them to sometimes receive differing treatment.

This treatment however, should be based on the premise that they have equal consideration, which leads to this different treatment (based on needs and ability, rather than an arbitrary characteristic) being fair and judged by the same moral principles applied to others (in this case men).

To state that two groups of people are inherently equal, does not necessarily result in the same treatment because they might require different things.