(Just like there are radical atheists there are radical feminists, usually in university where everyone is radical. People usually grow out of that.)
Meanwhile the MRA is a recent movement. While I've heard of men that have to fight against the system, the MRA websites for forums I am aware of are filled with hostility toward women. They seem to represent the same radical university student mindset, don't criticize those in their own movement who encourage violence against women (and I don't mean just hitting back).
Though I admit that there may be forums, blogs and groups that support the equality of men and women from a men's perspective but I don't see it. The MRA websites I am aware of (and this may be my ignorance speaking) actually voice concern that women are given the same opportunities as men at times, and tend to be filled with conspiracy theories.
I.e., watching people up vote comments on reddit's MRA topics that include violence against women, and the same for other websites quoted on this web forum in this or the MRA thread that's going on at the same time.
Actually, I've very interested in the topic of men's rights and would appreciate anyone recommending a place I can go to hear about more of the ways that sexism effect men negatively. Back in the 1950s sexism effected men far more than they do now.
Consider what I wrote here: http://sguforums.com/index.php/topic,41326.msg9207452.html#msg9207452