useState/useEffect vs useMemo - essentially equivalent

compare-useEffect-useMemo.js

// useEffect & useState
const useCalculate = numberProp => {
  const [result, setResult] = useState<number>(null);

  useEffect(() => {
    setResult(expensiveCalculation(numberProp));
  }, [numberProp]);

  return result;
};

// useMemo
const useCalculateWithMemo = numberProp => {
  return useMemo(() => {
    return expensiveCalculation(numberProp);
  }, [numberProp]);
};