Both of the cards in the scan are from "Trump Plaza" in Atlantic City. The back ground lettering on the bottom card is very light compared to the top card. Also the inside of the crown, above Trump Plaza on the bottom card is black while the top one is gray. Also on the back the bottom card in the left hand corner it's marked SC1. There's no such mark on the top card. The bottom card doesn't seem to have been used more than the top one. Is this a variation? Any help would be appreciated.

Thanks,
Victor