Shouldn't make any difference. Fish are fish. I don't think there is any nutritional difference between freshwater and saltwater fish. It is all about what they eat. The further up the food chain, the less nutrients in the food.

Cichlids are closer to SW fish than just about anything else, especially south americans. I assume you raise them in a bit saltier environment than just str8 freshwater since they like to spawn with the addition of salt.