One of the most easiest ways to differentiate red terrors from the common Mayan cichlid is the dot on the tail. Red terrors have the same black dot but it should only be on the upper half of the tail. The Mayan cichlid's black tail dot will be larger and cover a larger portiOn of the tail or dead center
In my opinion you have a Mayan cichlid. Beautiful fish. Aggressive. Large. Could be a hybrid too