What are the main differences between sponge cake and pound cake in terms of texture, ingredients, and baking techniques?

Sponge cake is light and airy with a spongy texture, made with eggs, sugar, flour, and sometimes butter. It is leavened mainly by beaten eggs. Pound cake is denser and richer, made with equal parts of flour, butter, sugar, and eggs. It is leavened by baking powder or baking soda. Sponge cake is typically baked at a lower temperature for a shorter time, while pound cake is baked at a higher temperature for a longer time.