Depends on which species.. I'd say the best match up would be Hierodula Majuscula vs Rhombodera Valida. I think majuscula are a bit larger, and maybe more aggressive predators. But it depends on what you like the look of more. Bright red inner arms vs a big shield and light orange inner arms lol.
thanks for the feedback guys ^^ currently raising giant asain and rhombedera stalis ..Ill get the size differentials for myself once theyre adults :devil: