when it comes to how they're regarded. USC is probably among the most highly regarded and iconic college football brands in America- easily Top 10- probably Top 5. When you look at the number of national championships, Rose Bowls, Heisman trophy winners, etc- they are an elite program- in the same company as ND, Michigan, Ohio State, and Alabama.
But right now, USC is a dumpster fire. They were 5-7 last year- despite still getting elite talent. They have a crappy AD. Clay Helton is certainly on the hot seat right now- who knows if he'll even make it through the season. Helton's also had some serious staff issues.
Utah won the PAC-12 South, and played in the championship game. They're returning a lot of their starters. And are ranked in the pre-season polls. Right now, they're one of the better Pac-12 teams. But no, they're not a national brand.