Atlanta is the worst 1 loss team ever. I mean they do beat some good teams, but they also play very badly a lot of times and end up barely sneaking away with wins against teams they should be beating relentlessly.
Detroit has the X factor that is Calvin Johnson. He is going OFF this year and Atlanta needs to contain him or the Lions will run up the score quick. They have a capable Tight End and other decent receivers.
The thing I don't get about Atlanta, is they should be dominating about every team when their offense is out on the field. I mean Matt Ryan, Michael Turner, Julio Jones, Roddy White, Tony Gonzalez, they should be downright dominant.