is better than Utah's defense. They haven't given up more than 19 in any game, and are allowing only 15+ per game in SEC play. There are many in SEC country that feel they are the best defense in what is the best conference in the country (anyone claiming the B1G is better can spare the comedy; the B1G may be weaker than the B12).
That said, the UT offense hasn't been dynamite. I think it would be a good game. I think Georgia would be a tougher matchup for BYU. I think BYU has a really good shot against Indiana, Penn State, Miami, etc.