Madagascar, and Central America have similar water, so I wouldn't be too concerned about that.
What would concern me would be physical similarities.
Any cichlid with a similar mouth structure, could be considered competition.
Any cichlid with iridescent spots or similar color (especially blue or black like a JD), might be considered competition.
Any cichlid with a similar body shape, also a competitor.
Any two or three of these combined, spells competition, and the possibility of aggression.
I believe resource competition is the major source of aggression with most N.W. and Malagasy cichlids, those similarities meaning, the other species vies for the same resources in nature, and especially in a tank, the lack of space magnifies these instincts.
The best tank mates for my Paratilapia, were other Madagascan cichlids of the genus Pretroplus
Note the very different mouth and head shape, opposite coloration, even fin shape.