Who wins?
Windows XP vs Windows 2000
Windows XP wins 88% to 12%. 12 more put them in the same row. From Windows Versions Tier List. Pick a side.
throwaway48223 on Windows XP: Bliss wallpaper and Luna theme, the best OS Microsoft ever made
DrunkWaffle42 on Windows 2000: ran almost everything made for XP and never crashed
Windows Versions Tier List: the full ranking