From what I have gathered, there are two versions of this set. One with blue backs and one with black backs.
Examples could be seen in the checklist already -
Black back: https://www.tcdb.com/ViewCard.cfm/sid/231368/cid/14522300/1992-The-Wiz-New-York-Yankees-Award-Winners-NNO-Ron-Guidry?PageIndex=1
Blue back: https://www.tcdb.com/ViewCard.cfm/sid/231368/cid/14522304/1992-The-Wiz-New-York-Yankees-Award-Winners-NNO-Billy-Martin?PageIndex=1
I myself have a blue back and black back for Don Mattingly. I don't know if any of the other WIZ sets have two versions as well. From asking other Mattingly collectors, the two other sets with Mattingly (80s and All-stars) only seem to have blue backs.
Does this warrant putting in a request to create separate versions of each card in the checklist? I don't have any insight into why these two different versions exist.