IME its not so much one type of food over another for enhanced growth. Feeding a variety can help keep your fish healthy and healthy fish grow the fastest. (I dont mean a variety of pellets, but combining pellets and veggies or frozen food). How often and how much you feed them may be a factor too. In a roomy tank I raised an oscar, a GT and many convicts. With ample room and a couple reasonably sized feedings a day they all grew quite quickly.