These appear to be color morphs of the honey gourami so coloration alone is not going help.

Female honey gouramis usually have a shorter rounded dorsal ( top) fish while the males have a longer more pointed one. Yours appear to have short pointed ones but since they are not fully extended, the pointedness could just be from the collapsed fin.
You need to have a lot of cover in the tank so that the fish can get away from each other. The circling can be a preliminary spawning routine as well as trying to establish dominance in the tank. Your tank is on the borderline of being too small for 2 non sexed honey gouramis. Unless you can get definite sexes, you are going to have to rely on their behavior as to if they can remain together. If you see any damage to one or both fish, they will need to be separated.