I think a win against LSU is undeniably better for BYU as far as national recognition and recruiting goes.
However, I'm sick of losing to the Utes so if I could get away with a guaranteed win against the Utes this year, I'd take the guaranteed win against the Utes and let the Cougars do their thing against LSU.
All in all, I hope they win both games and I actually believe they can win both games.
GO COUGARS!