How can I realistically compare my admission chances at UIUC and Brown?

The biggest practical difference is that UIUC evaluates you in the context of a specific program, while Brown is selecting a class through an extremely selective, broad holistic review. At UIUC, your intended major can substantially change the difficulty of admission, especially in capacity-constrained fields such as computer science, engineering, business, and some design programs. At Brown, strong applicants in every intended field face a very high bar, and no major makes admission routine.

For UIUC, compare your transcript, course rigor, grades in relevant subjects, and preparation against students applying to the same college or program. An applicant with advanced math, strong quantitative grades, and substantial computing work may be much more realistic for a technical program than a student with a similarly strong overall record but less aligned preparation. Illinois residency can also affect the context of your application. Treat UIUC as a reach for its most sought-after programs, even when it may be a more attainable option for other majors.

For Brown, ask whether your application demonstrates exceptional academic engagement beyond high grades. Brown will care about demanding coursework and sustained achievement, but also about the intellectual direction, curiosity, contributions, and perspective that emerge across your essays, activities, recommendations, and school context. Brown’s Open Curriculum makes it particularly useful to show how you pursue interests independently and across disciplines, rather than simply listing accomplishments.

A realistic application list would place Brown in the high-reach category for virtually every applicant, including applicants with near-perfect academics. UIUC may be a target, reach, or high reach depending primarily on your residency and intended program. Apply to both if each offers a meaningful academic fit, but do not use UIUC’s overall selectivity to estimate your odds for a particular major, or assume that an excellent UIUC profile makes Brown predictable.