I don't think gender affects too much how much a person is "better" than another, rather, how that person would act against THE BACKDROP OF THEIR GENDER. Our society has many expectations and stereotypes about different genders, and these affect our perceptions of people before they have done anything or spoken a word. I think women and men could be equally good people, but our society is clouded by history of male supremacy, and this, along with the push to equalize, have drastically affected societal views about men and women, and the relationship and comparison between the two.
In terms of being a good person, and whatever it means to you, would you say that females or males are generally better people than the other sex?
I've found women to be in general kinder, but I believe it's because men are socialized to be aggressive. I don't think testosterone is particular worse than estrogen in provoking cruelty or anything like that in terms of a biological reason.