How should I compare the admissions difficulty of UC San Diego and Carnegie Mellon?

Carnegie Mellon is typically the tougher admit overall, especially for its School of Computer Science, engineering, design, and drama programs; UC San Diego is also highly selective, but its difficulty is more strongly shaped by California residency and demand for particular majors.

At Carnegie Mellon, applicants are evaluated through the specific undergraduate school they select, so the selectivity of computer science or drama can look very different from that of a less capacity-constrained program. Your academic preparation should closely match the school: advanced math and computing work matter particularly for SCS and engineering, while portfolios or auditions are central for design, art, architecture, music, and drama applicants.

UC San Diego reviews applicants in the UC context, without SAT or ACT scores, and California residents make up a major part of its entering class. It is important to distinguish UCSD overall from its capped or high-demand majors, including several computing, engineering, and life-science pathways. Strong UC coursework, grades in required college-preparatory classes, and context within your high school carry substantial weight.

A California applicant seeking a non-capped UCSD major may face a meaningfully different process from an out-of-state applicant seeking UCSD computer science, while a Carnegie Mellon SCS applicant is competing in one of the most selective academic programs in the country.