GeoSolutions has leveraged on the flexibility and strength of the Open Source Product GeoServer, for which its staff members are core developers, to create an Enterprise-Ready version called GeoServer Enterprise.
GeoSolutions has selected the more robust and useful extensions available for GeoServer to create an Enterprise release in order to reduce the need for additional administration steps. Moreover a specific Enterprise-ready configuration has also been created which contains specific configuration tweaks, like mores strict resource limits and default availability of the control flow plugin (to reduce the risk of DoS attacks).
Additional extensions to perform massive imports of data or backup/restore of the configuration are being released as well and they will be moved to core as they mature.
Check this page for more information.