Well, If you are really intent on narrowing it down to determine which particular species of Port Acara you have, like I have already mentioned, the first step is to determine the number of anal spines. At least then you are dealing with narrowing it down from 6 or 7 species, and not 13. A really good picture with the anal fin erect, would be the best way. These pictures certainly are not going to show that, as well as having the fin folded to the body rather then erect. With enough effort and observation, it certainly can be done in person---many decades ago, I was able to count spines (both dorsal and anal) when I was a 9-10 year old kid so it is not beyond the ability of the average aquarist though it may take some real time and effort to be able to see it clearly. Here is a previous ID thread from last may, with another unidentified port acara:
https://www.cichlid-forum.com/phpBB/viewtopic.php?f=14&t=441146 You may find some useful information there(??), particularily about anal spines. From the pictures I was able to count 4 anal spines, though I really couldn't be certain from those pictures. The aquarist confirms that there is 4 anal spines. IMO, the fish is very elongated for a port acara.....and there is only one port species that ever gets called elongated, as port acaras are really deep bodied fish. I believe the fish in question in this link is
Cichlasoma taenia though I really am not certain.
This a key that might be helpful after the number of anal spines have been determined:
https://www.monsterfishkeepers.com/forums/threads/identifying-your-cichlasoma.366569/
Of course the real way to determine which species it is, is to know where the fish was originally collected from (or it's parents, grandparents ect). And with out that info, it is often more then difficult to determine with any certainty.