A few more pics … I do see some brown in at least one of the males, a bit unsure about the other but otherwise they do look alike
The middle picture is not gunawani at least I am sure about that. The other male ?
But as Peter says the band in the fin is a bit high – but I wonder if that though could be due to young age ? The brown in the tail to me is quite clear, – and the other markings in the tail as well .. but I am no expert though 🙂 ..