While it is good to have dreams and ambitions, there is no reason to worry about which is your number one school now while you are a freshman in high school. When you are a junior try to visit both campuses and take a tour. When you are a senior, you will have to decide whether to apply early decision at Rice and/or early action at MIT or regular decision to both. Both schools are extremely selective and only admit a small percentage of applicants. You should also find some target and safety schools with good architecture programs to put on your list also. If you are fortunate to be admitted to both schools, you can compare their offers then. Meanwhile, concentrate on your high school studies and enjoy your time in high school.