Why don't you post shots of them in the tank.
Clear, Broadside, pics are the best, with fins extended, showing cranial profile from the side.
Take enough photos, that if there are color deviations, fin extensions, and head shape, that these characteristics are obvious.
Here is an example.
Male carpintus

Below, same individual in breeding dress

Below Female carpintus in breeding dress

another female, not in breeding dress below

To get these 4 photos, I probably took 80 to 100 shots
Note how much less steep the female cranial profiles are
Note how much longer the male fin extensions are
Not the breeding colors in the female dorsal fin