New world is definitely where my heart lies and fish I prefer over other, in terms of the more commonly available fish in the hobby for the most part cichlids from the americas like Oscar’s, Jack Dempsey, green terrors, Cichla, Crenichicla, parachromis, and Kronoheros, etc, will grow a decent amount quicker compared to peacocks, mbuna, tropheus, and haps, in Africa. I can say my Oscar’s definitely grew quicker than my Malawi hawks and gar, but there are anlways exceptions like geophagus which in my experience grow pretty slowly.