The second one seems to have a pointier Dorsal fin. maybe a few more pictures to show their size compared to something else or each other. Is one much rounder? I had some of these but the male had a very pointy dorsal fin.
...Google quote ...
Male Gouramis are usually a bit smaller than the females and are slimmer in overall girth. Females have a rounded belly compared to the males. ... The dorsal fin of the female is short and rounded, while the male has a longer dorsal fin that comes to a point