Jerry wants to put at least one circular window in his basement. Jerry is trying to decide whether to put in two small windows, each with a $2\text{ }\text{ft}$2 ft​ diameter, or one large window with a $4\text{ }\text{ft}$4 ft​ diameter. Since Jerry wants to let in as much light as possible, he wants to use the option with the greater area. Should he install two small windows or one large window? What is the difference in the areas of the two small windows and one large window? Write the answer in terms of $\pi$π​.