Im a not an expert on site policy for this (or anything) but just speaking as someone who has no idea about these cards I think the listing as two separate cards with blank backs would be the way to go.
For example, if I was to have only the card depicting the player and went searching for it I would be looking for a NNO with a blank back. If I found images showing a card with player stats on the back it could throw me.
(Could the Note 2 field be used to help with this confusion? Maybe, but again site policy is not my strength!).