ZDnet takes a crack at XP v. Vista. Part 1 & Part 2
So, onto conclusions. Looking at the data there’s only one conclusion that can be drawn – Windows XP SP2 is faster than Windows Vista SP1. End of story. Out of the fifteen tests carried out, XP SP2 beat Vista SP1 in eleven, Vista SP1 beat XP SP2 in two of the tests, and two of the tests resulted in a draw.
But, you didn’t really need yet more proof that XP is faster than Vista, did you???
Also there are alleged performance gains for XP SP3 coming.