These are pearl gouramis, i believe the first pic is a female and the bottom a male. The fins on their belly are smooth on the top fish and spiked on the bottom fish, right under the gills.
The other noticeable difference is that the dorsal fin is less attached on the bottom fish as well as spiked edged, and the top fish's dorsal fin is more attached.

The other noticeable difference is that the dorsal fin is less attached on the bottom fish as well as spiked edged, and the top fish's dorsal fin is more attached.
