To a certain degree, different brands of feminism could function as different parties (certainly in academic feminism they do). A Christina-Hoff-Sommers-esque conservative feminist is unlikely to agree much with a Dworkinite radical feminist. For instance, "rape is a subset of violence with no particularly gendered component" and "rape is the natural outgrowth of a culture in which women's subordination to men is eroticized" are two substantially different positions (both of which I disagree with).* Admittedly, the average person is not particularly clear on the distinct branches of feminism; hell, there is still a widespread belief that radical feminist means "a feminist who's really extreme" as opposed to a distinct framework of theories and political beliefs. And even among the different groups of feminists there are usually some common premises (gender being at least partially a social construct, men being privileged over women, etc.). That said, I too would like more variation in the gender politics space; some groups (most notably, men) are distinctly underserved by the current gender discourse, and more competition in the marketplace of ideas can only be a good thing. :) *I am somewhat cheating here by picking an issue on which there is a lot of disagreement among different branches of feminism, as opposed to (say) the gender gap, in which the primary disagreement is between feminists who do and do not suck at math.