One isn't better than or worse than the other. I use both actually. Although I had more luck finding some old friends on FB,I enjoy the MS community as well.MS has some game apps that I enjoy.Don't worry what others say,if you like MS better that's fine.As I said one isn't better than the other,they are almost identical.
I used myspace for 4-5 years then switched to facebook and deleted myspace account. Myspace has a lot of fake profiles 40 year old men posing as 17 year old girls etc. It has a more spam to your message inbox. And it's slower because of all the stuff people add to their profile page. Facebook is simple fast, has games is more secure and way more people use it now. Upward of 100 million.