What is the difference between Windows Vista and Windows Vista Upgrade?

You need to have a previous version of M$'s junk OS to use the upgrade version.

Aside from that they are both the same crappy operating system with the same crappy DRM and same useless eye candy (except for Home Basic which doesn't have the eye candy or half the other features).

Neither of them has any of the useful promised features Micro$oft said they'd put in Vista (back when it was codenamed Longhorn).

What is the difference between Windows Vista and Windows Vista Upgrade?antispam

nothing

they both hang

What is the difference between Windows Vista and Windows Vista Upgrade?avast

Windows vista upgrade version allows you to upgrade previous version of windows in to vista. The server version cannot be upgraded. You must have a licensed previous version to enable you to upgrade. Upgrade version is about 1/3 cheaper than full version of windows vista.
Think of a Mk 1 car and then think of a Mk 2 car, that the difference on the Mk 2 car all the faults have been fixed. That's until they bring out the Mk 3 version