Just how much detail are you after?
Generally, the middle, Martini sponsored, car is a 2001 colourscheme and the "Performance Blue" bottom one was a 2002 colourscheme, although it did appear in RallyGB in these colours in 2001 driven by Mark Higgins. A good place for (small) reference shots of which colours were used where is
http://www.zone.ee/focushistory/index.html
As for detail changes, WRC cars evolve all the time. It's not clear whether the blue car is a 2001 or 2002 car.