when comparing them to the pair i have, the differences are very subtle. How are you determining them as both males? the smaller one has the straighter dorsal fin and the fanned tail where the larger one has a more rounded tail and te arched dorsal. You can also see the more rounded belly area on the smaller one right where the eggs come from and her eyes seem more centered [even though it is tilted a bit]. I am definitely not an expert, this is just my observation but I would like to know how you determined them as I have a breeding pair that just had babies and would like to know how to sex them.
I also agree that they are a nice set no matter what the sex.