From ESPN.com:
The Colts have played a tougher schedule. Their seven opponents have a combined 27-24 record. The Patriots' eight opponents have a combined 24-34 record. The Colts have won two tough road games, at Jacksonville and at Tennessee, while the Patriots' lone impressive road victory was against the Dallas Cowboys.
• The Colts, according to the scoring stats, have a better defense. The Colts are giving up 14.6 points per game, second best in the league, while the Patriots are giving up 15.9 points per game. From a yardage standpoint, the Patriots have an edge, allowing 268.5 yards per game compared to 272.9 for the Colts.
• The Patriots' offense is putting up huge numbers, leading the league in scoring at 41.4 points a game, but four of their games have come against the bottom four defensive teams in the league. The Jets (29th), Bills (30th), Bengals (31st) and Browns (32nd) all fell victim to the New England offense. Those games with the Patriots have something to do with why they're down so low, but they have also struggled against other offenses. The Dolphins, another Patriots victim, are ranked 24th in total defense. New England has also faced just one top 10 defense, the Cowboys at No. 6.
By contrast, the Colts offense, which is averaging 32 points per game, has faced just two defenses ranked lower than 20 -- the Carolina Panthers (21st) and Denver Broncos (25). They have faced two top 10 defenses, the fifth-ranked Tennessee Titans and the Tampa Bay Buccaneers, who come in at No. 8.