They are 3 different versions of Windows, here is a link you may find useful:-
http://www.microsoft.com/windows/windows-7/compare/versions.aspx
Vista has DX 10 when WIndows XP doesnt. While Vista was suppose to be the upgrade to XP, it had a lot of problems during the first launch and it took awhile to fix everything. Vista is suppose to run faster, and use less resources on your system. But Vista failed and Microsoft then released Windows 7 as the replacement to Vista.
No. Due to the length of time between the releases of Windows XP and Windows Vista, as well as Windows Vista ditching support for some legacy technologies, there are many devices that will not function in Windows Vista but work in Windows XP.
No. Obviously, if you upgrade to Windows Vista, you will have Windows Vista.
XP, if you can scratch Vista and go for Windows 7
windows Xp is better but Vista is slightly faster
Drivers written for Windows Vista are not backwards-compatible with Windows XP. Most hardware that has a driver for Vista should also have a driver for Windows XP.
The difference between windows XP and Vista are: The Box colors, instead of being solid colors, they're translucent. The Text on the boxes differ as well. You can also download widgets on the Vista. However, the XP is faster. vista is also trying to look/work like an i-mac with many small extras compared to xp although does not really work as is sort of half way between an imac and an xp
They are "compatible" in the sense that many applications that run on Windows XP will run on Windows Vista.
Yes ofcourse, Windows Vista is upgraded version of Windows XP. Obviously it can run Windows XP applications.
Windows XP is better. Vista is a better at running games, but it is slower and more problematic than XP
"Vista XP" is not a computer type. Vista and XP are both previous versions of the Windows operating system. The current version of Windows is Windows 8.1.
Yes. There is a process called Dual Booting, but it requires two hard drives. Just search for "how to dual boot windows vista and windows XP?".