FWIW, one thing that I find particularly compelling about these pictures is the PS X RES looks to me exactly like a pure RES.
I rarely deem to argue with the Master, but I find the red opercule border less extensive than on a pure RES - more like the little dab of red on a PS. And to me, the side pattern on a pure RES is
almost organized into vertical bars. The side pattern on the PSxRES appears completely disorganized.
Maybe just more evidence of the similarity between these two species.
For sure, as called out by ewest's Centrarchidae Family Tree: