Here he/she is again- note I snapped an adult neon in shot for scale- I'm estimating them at between 3-4 months old but if anyone knows different I'd be interested to hear.
Here are two pics of a female I used to own, the first is her under stress, note the incredible mottling! Never saw that in my males- second is her swimming not under stress.
Going on my paranoral ability to sex fish from just looking at them i would say two females (its worked on more than a few occasions for me when choosing "unsexable" fish) but i'm no Cichlid expert so really i havent got a clue.