The 2007
While the Broncos are dominating opponents in a different manner than the 2007 Patriots, Denver is 5-0 and outscoring their opponents by 18.2 points per game. That would be the second-highest point differential per game in the Super Bowl era.
The Broncos are doing it with offense, averaging 46.0 points per game. The 2007 Patriots had a better mix of good offense (36.8 points per game) and good defense (17.1 points allowed per game). Still, the end result is nearly identical for both teams which means the Broncos may have a shot to become just the second team to go 16-0...
Data via Pro-Football-Reference.com