The pictured fish look to be somewhat short bodied (not unusual to see a spectrum of “short body” in some groups of rams, I don’t know if this is due to this aspect being non uniform in some breeding lines or if a “short body” ram has been crossed with a “normal body” ram etc)
With electric blues, behaviour is the best indicator of male/female
While some EB males have longer finnage, some are less pronounced
With “normal body” EB’s, males are often larger than females of same age, though a subordinate male may also be slower in growth (so don’t rush to judgement with young fish)
How long have you had these fish?
Have they grown much since purchase?
ETA when purchasing a group of EB rams, select a size range from smaller to larger, and also skip the most/least aggressive in the display tank if you’re intending to keep as a group
(IME this color variant tends to be less aggressive than wild type coloring - which have an advantage as they are able to communicate via the bar pattern - and others, eg, Holland red, gold, German blue etc)
Note that any of the “short body” ram variants are shorter lived than their “normal body” counterparts, and face more health challenges due to the compression of internal organs etc