Just found a second variation of the white Membership Card from the St. Tropaz Casino Cruises in FL.

One variation has smaller logos on the front and "Membership Card" is on two lines with a smaller "VIP Membership Card"

The other, newer, variation has larger logos and "Membership Card" is on one line.

The slot guide didn't list both variations earlier and you probably wouldn't have noticed the different unless you happened to have both cards since both cards fit the original description. Both variations will now be listed in the next edition of the slot guide and we'll get scans on the ChipGuide once we get to the cruise ship cards.