Generally Arizona has more speed but Iowa State generally is more sound positionwise and a bit stronger. A slow field tends to equalize the speed taking away one of Arizona's advantages.Why would we want to slow down our speed?
Listen to the CW pod. Arizona's defense depends on playing fast - hair on fire fast. If you can slow them down a step it may be all that is needed for someone to hit a gap and be gone before the crashing safety can get there.