I use them both, but can't compare. They're different, aren't they? I love Facebook mostly because of its games though
Twitter is teh awesome. Facebook has peaked and MySpace is on its way down. Feel free to follow @melaniekraus
I have never used Facebook and opened a twitter account just to check why its so famous. However, I don't use it much. But, I would go with twitter.
I prefer to meet real people in the real world rather than hide behind a faceless reality that sucks the very meaning of humanity from our souls. Lol i jest, facebook for me, too many twits and twats twittering on twitter.