It should be noted that this is a very dumb question. The answer is NO
Why? What's the harder challenge:
Patriots: Since 2000, cruising to AFC East titles with no serious competition, a Hall of Fame quarterback every year, and a Hall of Fame head coach every year. 3-2 Super Bowl record.
Ravens: Since 2000, battling the 3-time Super Bowl participant Pittsburgh Steelers to bloody 10 win AFC North titles/wildcards, with no consistent quarterback, with different head coaches. 2-0 Super Bowl record.
Their ability to continually draft strong every year:
Look at the players this team has drafted since they started in the league:
Not to mention guys like Ray Lewis, Chris McAllister, Peter Boulware, Duane Starks, Jonathon Ogden, Jamie Sharper, Brandon Stokley.
When you can pick up (in many of their drafts) three starters every year, and then not to mention role players many of times, you are going to win in this league.