It appears to me, as a graduate of both, that the difference is largely attributable to the business school receiving larger grants from alumni than the engineering school. The graduate school of business recently received a very large donation from an alumnus, sufficient to build a brand new and extremely modern facility to house its MBA program.

But I wouldn't necessarily say that the university as a whole puts more focus on the business school than engineering - in fact, before the Hough donation, the MBA facilities were located in between two floors of a very old building, and you had to actually duck down to enter, through a very short and narrow doorway, a la Being John Malkovich.