The blue looks like a female to me. Nice rounded body, no extended rays at the front of the dorsal fin. The lateral black spot is a bit "inbetween" for me (not quite definately completely black enough to convincingly be a male, but no obvious big blue "spangles" in it, indicating female) .... could be either male or female. But overall I'd say the fish is a female.
The golden, I would say is a male, due to the extended rays at the front of the dorsal fin. Body shape is rather female, but could easily be just a very well fed male. overall I'd say a male.
Lol, probably got them both wrong. Let us know if they breed, which is which.