I’ve seen so many of these split up that I have always followed that pattern. I do own two CDs of one artist with the only difference being the change from PDO to PMDC and had originally put them as a single combined release, but credited both labels in the “pressed by” relationships. Some point in the last few years I split them after a forum discussion. (I wonder if I can find it?)
Ah - the fun of multiple opinions…
Edit: Not going to feel guilty about that split. Just pulled those CDs off the shelf and spotted a physical manufacturing difference. That PDO CD is old enough to not have the raised ring on the inner to keep it off the desk. i.e. one of those CDs that sticks to the scanner glass due to static and you need a plunger to get off 