To me it looks like a pork center-cut rib chop and a pork loin chop. Rib chops (presumably the bottom piece) are usually darker in color than the standard loin chop (the top piece behind the label). When I package the pork chops I cut, I always have the rib chops started at the bottom, becauee they are usually the bigger of the cuts. Then I will place in a layer, the sirloin and loin chops to complete the package (usually with 6 chops in one value pack). Which what appears to be done here too.

Source: I'm a grocery store meat department associate with 5 years total departmental experience, 3 years cutting experience.