You don't have to solely rely on one professor's opinion. Just check the placement of each program and its specialization area. Because econ areas in b-school have usually a small group, they each have some focusing fields. So students should jointly consider each program's specialized field and its placement history when comparing econ dep and buz econ program. It's not easy to just say one is superior than the other. And I've seen a lot of job market candidates who did great (better compared to econ candidates of the same univ.) from b-school econ group. Of course, the other direction is also frequently observed.