Need help IDing "honey" gourami

So, I bought what I thought was a male/female pair of sunset honey gouramis from my lfs, not a chain. Now I'm both worried that they might be sick and suspicious that they might be a different variety. I quarantined them for two weeks and medicated them. They seemed really healthy and looked like the top photo with them both together by the thermometer that whole time (ie. orange with a paler face and white/clear tail). Once I moved them into my tank, they both started to get a much darker coloration, like a dark haze that somewhat muted their colors and the tails turned blackish-grey. You can see the color difference in the "definitely a male" one in center of the second photo and little bit in the "possibly a female" fish in the bottom photo. The pictures give an okay idea of color but are from my cell phone which keeps messing with the saturation. I've googled photos of honeys with the throat turning black when they're spawning but this looks very different to me but I'm really new to fish keeping. My quarantine setup is actually just a dedicated fish bucket with a sponge filter and is white (my spouse caught on to my habit of turning quarantine tanks into permanent setups, lol). My tank has black sand and lots of plants and hiding places. Could the color change be just due to their response to going from a white bucket to black sand tank? Could it be a sickness or sign of stress? The water parameters are the same as when they were in quarantine but my tank had a bout of fungus on my driftwood that I fixed before I added these fish. I am going through a brown algae/diatom bloom even though my nitrates are low (0-5ppm). Could that hurt the fish or cause them to change color? Or is there something I haven't considered? They are both still active and besides the color change, appear healthy and have hearty appetites.

Do you think the bottom fish is really a female or could it be a less dominant male? It is fatter than the 'definitely a male' one and a little less vivid plus had a more rounded top fin. The reason I doubt it is a female is because the male is incredibly aggressive and will attack if he ever sees 'her', even if 'she' is across the whole tank. I thought they were supposed to be social and like being in pairs??? I'm worried I'll have to take one back. He is being a total jerk. This is especially weird because in the quarantine bucket, 'she' would sometimes chase him away from the food but nothing like the level of aggression displayed now that they're in the big tank and roles have reversed. Any advice? I really like them and have spent a good bit of time on them and they will now nibble wafers from my hand, which is one of the coolest things in the world

And finally, the title question. Do you really think these are a type of hybrid honey, or maybe a thick lipped or something else? Based on the color they're not a pure/original honey. I was attracted to the idea of honeys because they stay small and are supposed to be good in a peaceful community tank.

Thanks for reading this far!!!

 

All T.labiosa (thicklipped)

 

I was gonna say that these do not look like Honey Gourami.

 

Definitely a sunset thick lipped. The bottom one looks female to me (rounded fin).

 

Thanks everyone! I think that I did get a male/female pair. I've walked in on them 'cupping' a couple of times now.

Have any of you kept thick lipped gouramis (on purpose or not)? How big did they get for you? I liked the idea of honeys maxing out at 2.5" in a tank and might have to change my stocking plans if these do get to 4+". Did yours turn dark colored? I found a few other threads on here that referenced thick lipped gouramis turning dark, but they didn't give a cause (maybe breeding dress or sick/stressed?) and if it was temporary or permanent.

Are your males constantly territorial? I'm pretty sure mine is trying to mate and just picked the worst spot to setup his nest. He has decided that the floating food ring is where he is going to blow bubbles, to heck with everyone else trying to eat there. I ordered more rings so he can have one and everyone else can still eat. How long does mating season last? They've only been in the big tank a few days but I'm tired of him harassing even the oblivious goldfish who is 3 times his size (I know I need to rehome the goldfish soon).