Gloss black>Satin Silver.
You'd probably get the later color, dark I think. I doubt the part number changed, as the part itself hasn't changed. Its like on the Ranger, which are black, some have a rubber type coating, others don't...order a new one from Ford and you get one with the rubber coating. Car makers are good at making little, bitty changes, not telling anyone, and not making the appropriate changes so that a mix up can't happen.