You couldn't ask for a bigger contrast in styles with Air Force a top rushing team and Washington State a great passing team. The Cougars led the nation in passing with Anthony Gordon putting up better numbers than any QB, including Joe Burrow. 
Gordon has a slew of talented wideouts. Air Force is better versus the run than pass. The Falcons are used to running teams in the Mountain West Conference. Their pass defensive numbers look better than what their talent level is since they played Colgate along with heavily ground-oriented Army and Navy. 
Air Force doesn't have the depth in the secondary to hang with Washington State. The Falcons also lack the necessary strong pass rush. If you discount games against Colorado State and Hawaii, the Falcons only had 13 sacks.
Washington State is better stopping the run than the pass. The Cougars have covered 15 of the last 22 times they've been underdogs.