Mashable: Facebook Pages vs. Groups

You can Build your Cause, Team or Brand by using Social Media Websites like Facebook.  Pages and Groups in Facebook work in different way.   Each one has characteristics that can help your interests. Search for “Facebook Pages versus Groups” to research any differences and updates. But here’s some basic differences.

Facebook

Pages

•Connects with Brands, Products, Artists

•Add pictures, updates and more.

•Become a Fan

•Unlimited Members

•Can Host Applications

When using Pages, you might want to think about 'Causes'.

Groups

•Better for Causes & Organizations

•Administrator can control Group

•More User Control

•Limited to 5,000 members

•Cannot Host Applications

Here's a useful article on Facebook Pages vs. Groups (though dated in 2008)