Did you know fantastic help is an anagram of Planet Catfish? This forum is for those of you with pictures of your catfish who are looking for help identifying them. There are many here to help and a firm ID is the first step towards keeping your catfish in the best conditions.
Cory A does look like a Corydoras sp. cf. treitlii. Are they suppose to have a saddlenose or round nose? Mine seems to have a round nosed, as compared to Cory B which has a saddlenose.
Also, the dorsal and tail fin on Cory B is clear and has no markings. I did a search and found that C. ellisae has some slight pattern/markings on its tail and dorsal fin.