Is Facebook safer than Myspace? Or is it the other way around?

I have a Myspace, but a lot of people talk about the dangers of it and all the rapists and stuff. But people usually say good stuff about the safety of Facebook. Yesterday I was looking at this countdown thingy of the 5 worst sites or something and Facebook was higher on the list than Myspace. So should I get rid of my Myspace and get a Facebook? I'm kinda confused....