04-21-2010 06:41 AM
The difference lies with the database engine and scalability. With a different database comes a different recommendation for networked user counts: Sage Software reccomends ACT! Premium for 5 to 50 users or more and ACT! Premium for Web (EX Editions) and up to 50 users (we have seen more) for ACT! Premium for Workgroups and ACT! Premium for Web (ST Editions). Actual scalability and number of users supported really will vary based on hardware and size and usage of your database. The standard version (without the premium designation) is generally for 1-5 users but never more than 10.
A practical point. All users of a common database must share the same version. You can't mix ACT premium and ACT standard.