What SharePoint 2013 enterprise CAL provides over Standard CAL (Client Access License)

The Standard CAL delivers the core capabilities of SharePoint like the below

• Sites: A Single Infrastructure for All Your Business Web Sites
• Communities: An Integrated Collaboration Platform
• Content: ECM for the Masses
• Search: People & expertise search, visual previews, visual best bets

The Enterprise CAL delivers the full capabilities of SharePoint

• Sites: A Single Infrastructure for All Your Business Web Sites
• Communities: An Integrated Collaboration Platform
• Content: ECM for the Masses
• Search: Standard search features plus entity extraction, video search, item recommendations
• Business Solutions (includes Access Services and InfoPath Services)
• Business Intelligence for Everyone (includes Power View, PerformancePoint Services, Excel Services, and Visio Services)