The Bengals flew to Invesco Field for a snowy Week 16 intraconference game with the Broncos. In the first quarter, Cincinnati scored first with running back Rudi Johnson's 6-yard touchdown run for the only score of the period. In the second quarter, Jay Cutler tied the game at seven, with a 1-yard TD pass to tight end Tony Scheffler. Cutler then handed Denver the lead with a 39-yard touchdown pass to wide receiver Javon Walker. The Bengals cut the Bronco's lead with kicker Shayne Graham's 46-yard field goal, and quarterback Carson Palmer gave the Bengals the lead with an 11-yard touchdown pass to wide receiver Chris Henry. In the second half, Denver pulled ahead with running back Mike Bell's 2-yard touchdown run, and kicker Jason Elam's 24-yard field goal.  Cincinnati would pull within one point with Palmer's 10-yard touchdown pass to wide receiver T. J. Houshmandzadeh. On the extra point attempt, holder Kyle Larson allowed the snap to fly between his hands, securing the Broncos' win. The Bengal loss dropped their record to 8-7.
Question: How many fewer yards was Mike Bell's touchdown run than Rudi Johnson's?
Answer: 4