I would say BYU owns the Aggies.
WinsipediaWinsipedia - Database and infographics of Utah State Aggies vs. BYU Cougars football series history and all-time records, national championships, conference championships, bowl games, wins, bowl record, All-Americans, Heisman winners, and NFL Draft picks
http://www.winsipedia.com/utah-state/vs/byu