[Aqua Jon]

I have a GBR MF pair and the primary difference is in coloration, there are other distinctions as well. I imagine that these distinctions are displayed in all variations of the species. Look for longer first ray on the dorsal fin. It looks almost like the Little Rascals' Alfalfa hair sticking up, but in the front. My female does not have this. Her dorsal looks like it is relatively the same length throughout, tapering smoothly at the tail end.

 

[Aqua Jon]

I'm by no means an expert, but I'd agree. Typically males have stronger coloration and more elaborate fins. So that one we see the tail end looks a bit male. The top left GGR is a male. I cant see the dorsal of the other one.

Didnt say it earlier, but those Cocama are awesome!

 

[Aqua Jon]

Yeah the one in question seems to be a female. Notice the lack of "spike" at the front compared to the photo of the Gold ram you posted? The gold ram would be a male.

 

[Aqua Jon]

Well done! Your tank is coming along so well.
Tell those angels to get a room (1st pic).

now to tackle the BBA hehe ... story of my life

 

[Aqua Jon]

Oh noes! that's terrible, so sorry thelub what went wrong?!