Hi, great question. SoSuave predates RVF. It's from at least the late 90s. It's definitely old school.
Beyond that history, there's some overlap. RVF users posted a lot of interesting info about travel and women in other countries. Here it's more about improving your life, including but not limited to getting better with women.
Personally I like the tone better here, I think most users here are curious and inquisitive. My memory of RVF is fuzzy but I remember there being a lot of bickering and random banning of users. My impression (though I can't prove this) is that RVF attracted more angry incels who had an ax to grind and preferred to debate identity politics than to improve themselves. But again I could be way off there. I'm sure others will chime in with their experiences.