Which one should I choose?

You may choose the eddition depending on your need.SP Edition is the Service provider and Enterprise edition is for an enterprise itself.

If you want to provide services to any clients and businesses across the world you may choose SP Edition which is designed for B2B telemarketing. Enterprise Edition of ICTBroadcast is for an organization's personal telemarketing needs suitable for all kind of business, It also features interactive voice broadcasting , fax broadcasting, SMS messaging , call center integration, campaign management and scheduling. AMD (answering machine detection), DNC (do not call) and much more.