West African cichlids do have that dwarf SA cichlid look, which is probably why I like the West African cichlids so much. Kribs are a long-time favorite. I've also kept a few pairs of Enigmatochromis lucanusi -- you can't beat the colors on the female. Bright purple/maroon body with an iridescent teal stripe through the dorsal.
There's a lot of discussion (it's bickering really) about whether Dicrossus sex is influenced by pH or temperature, and whether it can change all the way up until sexual maturity or whether they're born one gender or another. Rumor is that Dicrossus are often heavy on one sex or the other, even in wild groups. It appears my last group was male-heavy. Hopefully this wild group is a bit more balanced.
As you can see from the video, the "females" tend to be much smaller than males with clear, stubby fins. The problem is that sneaker males will show this for months, then suddenly one day sprout pretty long fins and reveal themselves to be male. I don't think they're actually changing sex, I think it just takes time for the sexual dimorphism to show and some mature faster than others.