The Bengals began their 2008 campaign on the road against their AFC North foe, the Baltimore Ravens.  In the first quarter, Cincinnati trailed early as Ravens WR Mark Clayton turned a double reverse play into a 42-yard TD run.  In the second quarter, the Bengals continued to struggle as kicker Matt Stover gave Baltimore a 21-yard field goal.  Cincinnati would reply as kicker Shayne Graham nailed a 43-yard field goal.  However, in the third quarter, the Bengals continued to show their dismal defense as Ravens QB Joe Flacco got a 38-yard TD run.  In the fourth quarter, the Bengals tried to rally as CB Johnathan Joseph returned a fumble 65 yards for a touchdown.  However, Baltimore's defense stiffened and held on for the win. With the loss, Cincinnati began their season at 0-1.  It became the team's first regular season opening loss since 2004.
Question: How many more rushing touchdowns were scored compared to defensive touchdowns?
Answer: 1