Here are some statistics to support this claim:
Passing statistics
* Vince Young: 3,061 passing yards, 30 touchdowns, 10 interceptions
* Colt McCoy: 3,523 passing yards, 27 touchdowns, 13 interceptions
Rushing statistics
* Vince Young: 1,050 rushing yards, 12 touchdowns
* Colt McCoy: 399 rushing yards, 5 touchdowns
Total touchdowns
* Vince Young: 42 total touchdowns (30 passing, 12 rushing)
* Colt McCoy: 32 total touchdowns (27 passing, 5 rushing)
Wins and losses
* Vince Young: 30-2 record as a starter
* Colt McCoy: 45-8 record as a starter
National Championship
* Vince Young: Won the 2005 BCS National Championship Game
* Colt McCoy: Did not win a national championship
Awards
* Vince Young: Heisman Trophy winner, Walter Camp Player of the Year, Davey O'Brien Award, Maxwell Award, Associated Press College Player of the Year, Sporting News Player of the Year
* Colt McCoy: Manning Award, Davey O'Brien Award, Johnny Unitas Award, Maxwell Award, Walter Camp Player of the Year, Associated Press College Player of the Year, Sporting News Player of the Year
Overall, Vince Young had a more successful college football career than Colt McCoy. He won more games, scored more touchdowns, and won more individual awards.