Both have their own characteristic and feature and their implementation depends on the need and the importance,despite of this facebook is widely used because of its popularity and more users are hanging with this site

i think both is good but i like Facebook

Facebook is more effective b'coz they provide group,pages and profile while twitter only provide profile place to promote business....

facebook is to develop business communications
and twitter is to promote the business profile

twitter is very good social site. increasing you site real visitor

According to me facebook is good

Both are good because both has diffrent as well as unique fuctionality. But if you ask as a personal then i like to use facebook.

Facebook, is more effective b'coz fb provide multiple ways for promotion, like Profile,Page,Groups,community etc....

facebook because it keeps updated it self and provides us new features all the time.

Both are good but facebook have more feature.