Quote Originally Posted by gerf
In my experience, XP uses more resources than 2000. Also, I've seen very stable systems with 2000 have huge issues with XP, including freezes and reboots. I do not suggest getting XP if you're already using 2000 unless there is some component XP has that is required. As far as I can tell, XP has very few benefits over 2000.
While it took me a long time to consider XP over 2000, going to XP PRO I got a free speed increase on my old PIII 750. W2k didn't like my ABIT BX6 2.0 running the Slot1 PIII in "turbo" mode. BSOD no matter what I did... XP PRO though could care less about the "turbo" mode and I was able to go from PIII 750 to PIII 789 just like that!

Side by side, same hardware I believe from my own testing that XP is faster. You can turn off most of the fluff with XP... XP2 seemed even faster than my original XP build.