Yes

The aero package was refined. The biggest noticable difference from last years car is in the rear defuser area and the addition of a "mid-wing," redesigned front brake intakes, the rear intakes, the corner winglets and other general aerodynamic revisions. I am sure you could pass the revell kit off as the 2008 with the right decals, though, as these changes are slight.

The changes are technical and or mechanical, like the covered brakes, reduced weight, etc.