Better would be to check the course offerings and faculty rosters at each school to see if the upper level math offerings match your interests (or that many areas are covered well by the upper level math offerings if you are undecided within the subject).
If you will be very advanced in math at high school graduation (i.e. math beyond single variable calculus while in high school), that may be particularly important. Depending on your interests, graduate-level courses available to undergraduates may also be important.