At that size most new world cichlids look very much alike, and there are over 300 species of NW cichlids, so you'll need a few months growth before individual characteristics start to show.
Some examples below
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above young Vieja breidhori, below Amphlpphus flaveolus (both Central Americans)
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Below Australoheros "red Ceibal" a South American
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and although they are all the same species in the shot above, some appear very different from each other.
Color of substrate, mood, feeding or not, intensity of light, plant life, etc, etc all have an influence on how they present.
Young (but a little older) Vieja melanura and Cincelichthys pearsei below (Central Americans)
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