You should use both where as facebook helps much in growing your business.

both are very good for business purpose.

None of them. Spending your time on those two sites are a waste of time you can spend on other way cool stuffs...

Both are good but i think Facebook is best at this time.

Depends
 

Depends on what kind of Business it is...!!
Suppose its of some kind of Blogging or News Website than nothing is best than Facebook.. But if its related to some kind of development than Twitter is the best

Both are good in quality traffic generation for a business,But personally i will go with Facebook because it is user friendly more then Twitter.
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both are best but in comparision i like facebook.

I think Twitter

Both are good social networking sites. But Facebook is much more popular than twitter.

I think that facebook is the best platform, it better twitter a lot. Its viral traffic is awesome if you know build your fanpage. This is a perfect way

Facebook has helped me find long-lost family members, sign dozens of new clients, meet new friends, and share and learn new ideas.FACEBOOK has also allowed me to help others by “connecting dots.” I’ve helped my Facebook friends find jobs, sell their apartments and hire employees; I even reunited two estranged siblings, who hadn’t spoken in twenty years.

I think facebook is stronger for business. But depends a strong twitter presence also can be very good.

Both these social sites are important to drive the traffic to the business.

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