Does Windows Vista Ultimate lack some features from Windows Vista Enterpise?

Vista Ultimate has nine extra features not included in the Vista Enterprise that is sold to business only through volume licensing. Suffice to say, these nine extra features are more suited for home environment than it is for business.

http://support.teloep.org/vistaver.htm

i_Xp/VistaUser

Enterprise and Buisness Editions add an extra 5 years of product support over the other editions.

Hmmm... sounds like the enterprise edition is relatied to windows xp home edition and the ultimate version is related to windows xp professional, except its the other way round!

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