OK, here's a brain teaser - which of these cards is not like the others?
Not so tough, right - the blue one? Yes.... and no. None of these cards are the same.
A tougher question might be - which is the one I shared last week?
Maybe if I flip them over?
So, top left is the base card - top right is the blue card. Bottom left is the bright yellow back variation, bottom right is the "Grey" back, but it's more of a woodgrain / brown. I guess the good news is that this wasn't a high number, or there'd be even more variations to chase. There is one not shown here - the "flip" variation, which has a glossy back and a rough front. I saw one on eBay for $25, but I am ok with missing out on it, at least for now....
Oh, and Andy Warhol did team up with Topps back in the 80s: