How should I compare Texas A&M and UC San Diego to decide which offers better college value?

Academic value should be judged at the department level, not by overall reputation. UC San Diego has an especially research-intensive environment; its quarter system moves quickly and can suit students who like taking more courses in shorter terms. Texas A&M offers a large, well-resourced campus with particular depth in engineering, agriculture, business, and public-service-oriented fields.

Campus experience affects value because students tend to get more from a place where they will participate and persist. UCSD has a coastal urban-suburban setting, a more independent social atmosphere, and a residential college system. Texas A&M has a traditional college-town setting, a strong school-spirit culture, and a more centralized campus identity.

For the same major, compare required courses, access to undergraduate research, internship pipelines, career outcomes in the region where you may want to work, and whether graduating in four years is realistic. A lower-cost offer with strong recruiting in your intended field is usually the more valuable choice than a modest prestige difference.