After watching KSU play with Oregon defensively for a half, Bama would be all over that ass.
Eh, Alabama definitely has a better defense than KSU's, no doubting that. It's not really close. However, the matchup is tougher for Alabama. KSU is an attacking, slanting defense that relies on penetration. They also get to see the zone read and option every single day in practice.
Alabama, on the otherhand, is primarily a 2-gap scheme from its 3-4 look. I'm not saying it's impossible (and they would run more 1-gap schemes as they do that probably 30% of the time in normal games), but 2-gapping a team like Oregon would be extremely tough.