So CyTwins is doing his Iowa plays a weak schedule thing again, so I thought I would go see what the data says about this.
Site below has Final SOS for the last 17 Season. In the last 17 years, Iowa has played a tougher schedule than Iowa State 11 times. In each of those 11 seasons, Iowa State finished the season unranked, presumably lowering Iowa's SOS.
Iowa State has had a tougher schedule just 6 times in the last 17 years. 2 of the 6, Iowa finished ranked in the AP Top 25, presumably improving the Cyclones final SOS.
Avg SOS for the last 17 Seasons:
Iowa - 34th
Iowa State - 44th
NCAA College Football Strength of Schedule Rankings & Ratings from TeamRankings.com, your source for NCAAF computer power rankings.
www.teamrankings.com