The main difference is the amount of math they require.

Conceptual programs (like Harvard) cover all of the topics in the discipline. Micro, Macro, Game Theory, Labor Economics, etc, etc. They cover the theory. And use charts / graphs to discuss and illustrate the theory. If supply increase and demand remains constant, price falls, thus increase demand due to the cheaper price.

Math heavy programs (like BYU, MIT, Chicago) cover all of the topics but require the students to do all the math. In the Econ program almost every class (not ECON 110) requires calculus. You have to be able to hack the math. Econ 388 Econometrics requires you to really, really understand the math. This is much more demanding on the students.

BYU consistently places many of its Econ students in top Grad programs as well as highly desirable jobs in Investment Banking, Management Consulting and Public and Private buyside firms. BYU Econ has a nice track record. IMO.