Tom and John are both eight years old, living in two separate households in a neighborhood, and they both like the chocolate cupcake the most among all the snacks in the world. Their second favorite snack is a sugar-glazed donut. On one bright spring day, their moms (or dads) went grocery shopping together, and they both bought snacks for their own children. When Tom came home after school on that day, he found one chocolate cupcake on a dining table, with a note saying, "It is yours, Tom, enjoy!" So did he eat the cupcake. John found one chocolate cake and one sugar-glazed donut on the table, with a note saying, "Choose one, John, the other is for your brother." So did he eat a chocolate cupcake, too.
Between Tom and John, who is happier in terms of the satisfaction derived from their actions related to the consumption of a chocolate cake on that day? Provide a justification for your answer.