Seems to me growth rates between males and females of most cichlids is consistent, up until the point females mature and begin egg production. At that point the females energy becomes focused less on growth (at least temporarily), and more on eggs.
I agree the 1st 2 shots look female, and the 3rd male, but hard to tell on the 4th shot.
The dorsal has what appears to be a dark area (which is a female trait).
But in some cases, in a situation where there are 2 males and 1 is a smaller less dominant one, it may adapt female appearance as a protective strategy.
Once mature, male festae (as many cichlids of the tribe Heroini do) will often grow exceedingly larger than similar age females. Examples below