No the struggles aren't similar... unless you look at them as broadly (very broadly) similar, like under the vast categorical umbrella of "injustice"... Why do they need to be similar anyway? Injustice is injustice. All people who have a functioning moral compass should be on the same side of the "justice for all" "opportunity for all" "live and let live" issues. Nature is not neat. None of us have the same experiences or face the same social challenges. Even black men have different experiences with racism, depending on who they are, economic status, skin color, where they are, what generation, etc. etc. etc. Doesn't mean that we shouldn't have insight & empathy enough to know that no one likes injustice, indignity, oppression... and that there is only one justice. Two-tiered justice is injustice by definition, whether it's along the lines of ethnicity or gender or whatever.