The Windows Vista Enterprise operating system is available exclusively to Microsoft Software Assurance customers. Specifically designed for large organizations or those with complex IT needs, Windows Vista Enterprise provides easier application management and improved standardization for global operations.
VISTA business doesn`t have following things..
1. Bit- locker drive encryption
2. Subsystem for UNIX-based Applications
3. Virtual PC Express
4. All worldwide user interface languages (36 languages total) available
5. Support for simultaneous installation of multiple user interface languages
Vista Business has the option to be upgraded to vista Ultimate . But Vista Enterprise does not have that as it is already power packed for Business purposes .
Vista Business also has Windows movie maker which can be found in home Premium and Ultimate but it is not there in Enterprise.
Moreover Vista business is retail where as Vista Enterprise is volume-license only