Currently Festaes, Salvinis, Mayans and Trimacs don't actually have a proper genus they are assigned to. Rather, they are just called Ex-cichlasoma, ExCichlasoma, or 'Cichlasoma' [insert species here] atm, whilst they await being put into proper genera. If RTs and GTs are kept together with other cichlids, the aggression will be spread around and can well, survive each other.