We did a Challenger in FC7 and got a Dupont mix from Finishmaster for the engine compartment, trunk, and door jambs. We got two separate quarts that were exactly the same hue. We had a pro paint the outside of the car and he used Sherwin-Williams. His paint was spot-on to the original paint we found inside the doors whereas our Dupont looked kind of grey and lifeless next the S-W paint. We really like the exterior color of the car, but aren't happy with the Dupont paint we sprayed. I've since heard that they have two different codes for FC7 (it was C7 in their computer), the other one being more red, but I don't know if that's true. You're smart to be concerned and asking around, because the dealers will tell you confidently that their paint will be dead-on, but you won't know until it's too late.