The following page contains a comparison of the three Sugar editions (Community, Professional, Enterprise) for version 6:

http://www.sugarcrm.com/crm/products/editions.html

and there is also a very detailed overview:

http://media.sugarcrm.com/datasheets...Comparison.pdf

However, I need the same overview for Sugar CRM 5 but couldn't find it anywhere.

I greatly appreciate your help!