I hope this very detailed answer gives you all the answers that you need.Windows 7 Enterprise
This edition targets the enterprise segment of the market and is sold through volume licensing to companies which have a Software Assurance contract with Microsoft. Additional features include support for Multilingual User Interface (MUI) packages, BitLocker Drive Encryption, and UNIX application support, Not available through retail or OEM channels, this edition is distributed through Microsoft Software Assurance (SA).
As a result it includes several SA-only benefits, including a license allowing the operating of diskless nodes (diskless PCs), the running of multiple virtual machines, and activation via VLK. Like Professional, Microsoft will support this edition until 2020.Windows 7 Ultimate
Windows 7 Ultimate contains all of the same features as Windows 7 Enterprise, but unlike the Enterprise edition, it is available to home users on an individual license basis. Windows 7 Home Premium and Windows 7 Professional users are able to upgrade to Windows 7 Ultimate for a fee using Windows Anytime Upgrade if they wish to do so.
Unlike Windows Vista Ultimate, the Windows 7 Ultimate edition does not include the Windows Ultimate Extras feature or any exclusive features as Microsoft had stated. However, even though it is the consumer equivalent to Enterprise, like Home Premium, Microsoft will only support Ultimate until 2015
Thank You -
Edited for extras -
Edited by noknojon, 13 January 2012 - 03:40 PM.