Comparing different Vistas..There are four flavours of Windows Vista. This is the Microsofts way of doing business. They separate customers by their pockets and ..options to be precise. No offence please.
1. Windows Vista Basic
2. Windows Vista Home Premium
3. Windows Vista Business
4. Windows Vista Ultimate.
As we know, there is a big difference between Windows XP home edition and Windows XP Professional Edition. Home edition can't be used under networked environment whereas Professional can. So, these features are somewhere added or reduced and, there is change in naming convention too.
Now, coming to the point, what big differences are there in these different flavours of Windows Vista, i've found a comparison chart.
Click this link to find out