Windows 7 build 7048 vs. Windows 7 beta 1 vs. Vista vs. XP performance shootout - which is best?

Windows 7 build 7048 vs. Windows 7 beta 1 vs. Vista vs. XP performance shootout - which is best?

I have not read it all yet but I will. I just thought you guys might be interested!
http://blogs.zdnet.com/hardware/?p=3789&tag=nl.e589