In the pic with two gouramis, in my opinion, the one on the left is male and the one on the right is female. In the pic of just the one, I think that's a male. Why? They look like the ones I got from Maidenhead Aquatics. With these fish, any individual with even the hint of a dark stripe from nose to tail is female - and the one on the right in the first pic does have the hint of a stripe. And the ones with orange tails are usually males. The left one in the first pic, and the fish in the second both have orange tails. As they settle in and mature, that orange will become deeper and move further down the tail into the body. And if any of them ever get black on their throats, that's a male in breeding colour.
Spawning behaviour is the male swimming nose up in front of the female, who ignores him at the beginning. If he persists, she will finally show interest.
Swapping a potential male for a definite female would be the way to go. The way to choose a definite female is to go for the fish in the shop tank with the most definite dark stripe down its side. But haing said that, honeys are one of the few gouramis that are fine as a male/female pair. I've had more trouble over the years with two females squabbling that with a male harrassing a single female.
