Who is better?

I have a wager with a coworker of mine, over who will have the better record at the end of the season, the Vikings or the Colts. So far, they are two of the teams sitting undefeated after 5 weeks, and while some people are lauding the Vikings as better than the 98 iteration, I think we all need to look closer at the opponents they have defeated. Let's do it for both teams in order to figure out which team actually is better.
Vikings
Browns - Terrible, finally won while completing only 2
Lions - They went 0-16 last year. 0-16.
49ers - It was a thrilling victory with Brett Favre storming back to throw a late touchdown. Two weeks later, the 49ers lost by 30 at home to the Falcons.
Packers - Again, a home game. The defense shone. Probably the best victory they have had this season.
Rams - Haven't won since last year, may not win this year.
Colts
Jaguars - A tough game, no doubt, and the Jaguars laid an egg this week in Seattle.
Dolphins - People disparaged the Colts for their lack of ball control. This would be a problem if they weren't scoring nearly every posession. And the Dolphins are looking better and better.
Cardinals - They made the Super Bowl last year, despite how they look now.
Seahawks -It's hard to get a read on them, but they didn't have Hasselbeck when they played in Indianapolis
Titans - 0-5, though they were 13-3 last year. What happened?

So, there are arguments both ways to be sure, but I don't think we should say the Vikings are an elite team just yet. The Vikings have a tough stretch coming up with the Ravens and Steelers, while the Colts won't really get challenged again until week 10. I think I have my wager all but won.