IR & Econ with what goal? Law school? Public policy? IB?
The Johnson is a full ride including summer experience, the McKenna is $15K off sticker- that is a HUGE difference. Is the nearly $300,000 difference for your family completely immaterial? If not, then the differences between the 2 are comparatively immaterial.
That’s because, in the ways that matter (incl " Career prospect, Alumni network, educational experience, research and internship opportunity") what you do as a student will outweigh any differences in the two schools. I get the appeal of CA! but unless your family is one of those that can write the check without blinking this is a pretty open-and-shut case.