nope. all universal on the tails. Headlights should "fit", but you may have issues electrically with the harness that plugs into the back of the housings. It may have a different pin layout than on your 6. Easiest thing to do would be to take the time and get together and swap out one headlight housing on each car.
errr...one exception to my no mods. So long as you do not have a wagon. If you have a wagon your tails are different than the sedan/hatch models and will not work.