The Enterprise edition of windows vista is not available at retail shops for the pedestrian, it is available through its own chanels to Corporations
The enterprise edition is the only edition that comes supported for 10 years rather than 5, and has more business functionality
including Subsystem for UNIX-based applications (SUA), this feature is only available in the enterprise and Ultimate edition
Features only available in windows vista ultimate and enterprise
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Notes
XP's capability
HB
HP
B
U
E
Windows BitLocker Drive Encryption
A usefull feature that protects your data when windows is not in charge of the disks (more)
Third party encryption tools can securly encrypt your data, Convinience may be the only issue here
Support for simultaneous installation of multiple user interface languages
Like the name implies, to be able to install more than one language to the interface
Not possible
All worldwide user interface languages (36 languages total) available
Having the choice from 36 languages for the user interface
Subsystem for UNIX-based applications
(SUA)
Allows Unix applications to be run on windows, Success depends on application since it still uses the windows kernel here
NOTE: You can save up to $160 dollars if you do not want tech. support from Microsoft (You will get windows updates), To see how, Visit the checklist page.
Windows Vista OEM is meant to be cheaper since there is no tech support, But also installs on 1 computer only and can not be transferred to another computer
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