Beijing University of Posts and Telecommunications is better, including teachers, teaching facilities and learning atmosphere. The difficulty of the exam is basically around 0.75, because it is an optional exam after all, which also reflects a problem from the side, that is, Beiyou's control over students is quite strict. The grand MTI is also good, almost comparable to the North Tour. Therefore, if you are interested in applying for the exam, you should consider other factors and don't focus too much on the choice of these two famous schools. Both are fine. Good luck.