There's a white Bellagio Slot Department card that has been listed as an XX card in the guides and another variation of that card was just found.

The original card had bold, slightly larger text -- The Property of the Bellagio Slot Department and lines above and below the Belaggio name. Those lines were about 10mm apart.

The new found card is very similar but the text is no longer bold and is slightly smaller. Plus the lines above and below Belaggio are about 8.5mm apart.

Additionally, the bold font cards appear to have a brown mag strip while the new found normal font cards have a wide black mag stripe.