However they are used in different ways, by different users for different things. People mostly use twitter as a 'microblog'. It's like a blog, but each 'blog post' is limited to be very small. People use Facebook status updates to tell people what they are doing and to tell their friends things. If I see your facebook updates, you can see mine. Twitter is not like that. Facebook is for socializing, twitter is like newspapers. They are different, ergo it doesn't make sense to make them identical