These are both exceptional universities. Both have very strong and well deserved reputations. Forget about “prestige” or “reputation”, because prestige does not matter and also because both are excellent.
Either of these schools is going to require that you work hard and keep up with demanding classes that are full of very strong students. You might get to party occasionally, but expect to be working hard a lot more often than you are partying. You do not want to waste your time at either of these schools.
Assuming that the cost is similar, you should try to figure out which of these two excellent universities is a better fit for you. Part of that will depend upon your major, but part will just depend upon where you are the most comfortable.