Facebook and Twitter are the best, you can add google+ more in your list.

It can't be say that which one is best due to business point of views. Both are important for the internet business. It can be easily understand by taking an example that if you want to became an athlete then you should not only take run practicing but also take a healthy diet.

Twitter is better for business connection and facebook to generate some traffic to site...

Facebook is good

Both has importance and plays a major role to enhance business.

twitter is best

i think both are good

Both are useful for generating traffic on your site.

For Business Purpose facebook is best

I like Facebook compared to Twitter.

For me Facebook shows better result than Twitter. Through Facebook, I can bring targeted traffic.

Facebook is best & high traffic generator sites.

Twitter and Facebook both are equally important. I mostly use twitter

i think facebook is batter then twitter

Facebook is best for promoting website or blog.