I think without knowing Z, it’s hard to give advice. I assume Z is a public school that’s at least decent in Computer Science? If Z was on the level of UT Aust

I think without knowing Z, it’s hard to give advice. I assume Z is a public school that’s at least decent in Computer Science? If Z was on the level of UT Austin or University of Maryland, College Park, then going to MIT is a no brainer. However, if Z is Berkeley, then that’s a much tougher decision and I might lean towards Berkeley.