I've owned one of the Planks that was missing the color pass and the jersey came out greenish instead of brown. I agree with what people are saying though, this variation seems to be reasonably easy to come by....about half the Planks I see have it.
A lot of the other variations occur on normally orange cards that are missing a red color pass (I think it would be red anyways) so they turn out yellow. The Tinker and Evers are examples of this. I've also seen that there are a lot of yellow Gibsons out there. I believe this card is supposed to be orange but for some reason, I mostly just see the yellow examples.
Didn't have an e93 to show but do have an e97 that kind of shows off these same colors pretty well. I've never seen any card that has a "Two-toned" background the way this one does. It's almost as if the printer just completely ran out of red halfway through the printing of this card.
e97meyers-001.jpg