How do Purdue and Boston College differ in selectivity and admissions competitiveness?

The biggest practical difference is that Boston College is more admissions-competitive overall, while Purdue is more variable by major and can feel especially selective for certain programs rather than across the board. Boston College has a smaller undergraduate population, a more uniformly selective applicant pool, and a private-school admissions process that tends to be tougher in the aggregate. Purdue is a large public research university, and its selectivity depends more on what you are applying to, with fields like engineering and computer science standing out as notably harder than some other programs.

If you are asking which school is harder to get into in a general sense, Boston College is the tougher admit overall. A student who is competitive for Purdue as a whole is not automatically competitive for Boston College, especially because BC tends to expect very strong academics across the board along with a polished overall application. Purdue can be more accessible overall, but that does not mean it is easy, and some of its most popular majors are very competitive.

Another important difference is how students experience the process. At Purdue, your intended major matters a lot, so admissions competitiveness is not one single number in practice. At Boston College, the bar is high more consistently across the university, even though some schools within BC may still vary somewhat.

For a college list, I would treat Boston College as the more selective school overall and Purdue as a school that ranges from solidly selective to very competitive depending on the program. If you are looking at engineering, computer science, or other high-demand Purdue majors, the gap between the two may feel smaller than it does in a broad university-wide comparison.