Hello,
Yes i am going to be insane enough to try a response to this very sensitive question.
Are there differences in the effect of maltreatment between genders? I would think that the core of this question is missing itself. What is gender Identity. It is the way a person feels about themselves. That is extremely subjective and very much crated by the individual in a symbiotic dance with their subjective apperception of any situation; weather this is abusive or helpful.
Our Brain adapts to its environment. This is the continued process of brain growth. Commonly referred to a neuroplasticity these days. The more we interact with and react to situations in the same ways the stronger these connections become.
My advice would be to take a long look at Narrative therapy. I personally find it to be one of the most adaptable forms of therapy. With time we can all grow to see our interaction with the world through our Narratives and grow them to see more of the world and ourselves.