What is more energy spent on heating a cast-iron pot or water poured into it, if their masses are the same?

With the same mass of water and a cast-iron pot, more energy is consumed to heat the body, the specific heat capacity of which is greater. The specific heat capacity of water is about 4180 kJ / kg K, the specific heat capacity of cast iron is 0.540 kJ / kg K, i.e. far less. The main amount of energy when heating a cast-iron pot with water will be spent on heating the water.