#1212 with the Elby's Big Boy ad on the back is from the actual ProCards team set.
https://www.tcdb.com/ViewCard.cfm/sid/60190/cid/3528937/1990-ProCards-1212-Bob-Ayrault
#1211 is from the CMC Pre-Rookie set where they teamed with ProCards and issued reworked versions of the wood-grained team sets for the A & AA players.
https://www.tcdb.com/ViewCard.cfm/sid/59872/cid/3496404/1990-CMC-800-Bob-Ayrault
The CMC versions of the cards have a high gloss coating the ProCards team set versions lack (but which you can't see in a scan), often the photos are different, and the CMC versions have the smaller number in the lower right corner that is the actual numbering for the CMC set.
These get confused a lot, which is understandable given how the set is designed. Similar confusion comes from the CMC team sets vs the CMC Pre-Rookie, pack-issued sets. Same fronts, but different backs.