John is 30 years old. Jack is 10 years old. They are clinically sane.
One day, John feels a sudden, uncharacteristic urge to kill. He murders an innocent stranger.
On the same day, Jack feels the same urge to kill. He also murders an innocent stranger.
John and Jack both admit responsibility for the murders.
They acted in the same way for the same reason. Their actions had the same result.
Should they be punished in the same way?