I was thinking maybe the ad card or gaff card would be different like it was for the split spades. And also I wanted to see the shade of purple that was used, which so far has not surfaced as of yet.
Let me make something a little more clear. These were NOT made anything like the Split Spades.
For this particular deck, all of the colors were a single run off the same plates. For the UV blue, they just switched the paper. They started with one color in the machine for the one-color backs, probably blue, stopped in mid-run, swapped out the blue ink for red, then continued the print run until it was completed. The purple shade you're asking about isn't a single shade of purple - it's the transition from the blue ink to the red, once the blue ink was replaced with red and the remaining blue ink in the machine was being forced out by the supply of red ink. The purple decks are practically a different shade from deck to deck!
So, aside from color, every single deck is identical, because they were all printed from the same printing plates. No wacky gaff card changes, no weird ad cards, no bonuses, no omissions, no nothing.
Can anyone put these under black light?
Sure. You buy a black light, ship it to me and I'll put them under it. Do you need my mailing address?