The listed cards from the Splash Casino in Tunica, MS had 2 different versions of the gold Preferred Player card, one from Yoli and one from Multiform; but the silver card with the larger mermaid logo was only listed with the Multiform manufacturer. Turns out there is also a Yoli version of the silver card as well. And if you hadn't noticed, the Yoli cards have "Casino & Resort" in the front logo while the Multiform cards only say "Casino".

Here's scans of the new found silver card along with the originally listed card for comparison: