Posted 08 June 2012 - 10:55 AM
They are different part numbers - very close to each other, but they are different.
Many owners have been able to swap the grills from the 2005+ to the 2003-2004 model years - just that there might be an unsightly gap between the grille and hood. Bumper covers are different between those model years - which account for some of the misalignment.
But if you are handy with a little fabrication / don't mind the misfit - hard to tell unless you are looking for it.