No front bumper is completly diffrent on both and is unique to the Cosworth as are the front grill and lights (although lesser models can be adapted by cutting the tab off) unless you mean fogs?

The rear bumper is the same as any other Sapphire but the black inset is unique to the Cosworth and isn't avaliable anymore, I seem to remember hatch and Saphs are different though.

The windows rubbers will be the same.

Martin