i'm pretty sure the largemouth will have a much faster growth rate than the cichlid. i have had my blue ahli for about 2 years and its 4-5 inches long. that largemouth should more than double that in a year. if you try it good luck!
what do you mean by that? I know that keeping an lmb in tropical temp is no problem because they come from all over the place-flordia and further up north. lmbs are really tough fish