The Daniell cell has E° = 1.10 V for a reaction that moves 2 mol of electrons…

Step 1. Daniell. $\Delta G^\circ = -2 \times 96500 \times 1.10 = -212\,300\ \text{J/mol} = -212.3\ \text{kJ/mol}$.

Step 2. Copper and silver. $\Delta G^\circ = -2 \times 96500 \times 0.46 = -88\,780\ \text{J/mol} = -88.8\ \text{kJ/mol}$.

Step 3. Compare. The cell with the larger potential gives out more energy for each mole of reaction.