FB and Twitter are both awesome social networking websites. But there are significant difference in both. Facebook have no character limit, can upload any multimedia file like photo, video etc, interaction with friends are easy, can chat directly with online friends. On the other hand Twitter is a microblogging website enabling 140 charecter tweets.
i use both and i have seen quite a bit of traffic from both , facebook is easier to use but if you learn to use both you will get alot more traffic. so with my view its not twitter vs facebook its more like use both
For Traffic point of view, Facebook is the best to use and It has become now the best promotional community sites..
Fb and Twitter both have different concept FB is social site to enjoy with frnds twitter mostly use for SEo only and character are very less not feeling comfortable.
I think Facebook is better than Twitter because it is more familiar and much talk about Facebook by common people who has no much more ideas about Internet surfing .
Twitter is better. It helps for better and quicker indexation for new pages. From Twitter you may get more traffic if to know how to use it.
They are both excellent sources of traffic if used properly. They have their own unique ways to be used effectively. If you don't use them right then you will just be wasting your time. So make sure you use them in their own rights and you will get great traffic from both.
Both are good source of traffic of our site but before getting lots of traffic you should have your follower first and friends in facebook or even many likes in your page.