Even with Nelson I think the Atlanta's WRs are better than the Packers. I am honestly not sure how good the Packers WRs are. I get the feeling it is 80% Rodgers and 20% the wideouts.If Jordy Nelson is healthy enough to play I think you could make an argument that the Packers have a deeper core of wide-outs than Atlanta. The Packers defense also got more turnovers than Atlanta's defense during the regular season.
Neither defense is anything to brag home about but the Falcons are healthy and probably have a better pass rush.
Then again it should not have been possible for the Packers to beat the Cowboys when they drop 31 at home. If fucking Rodgers wins this SB by himself it will be approaching Breath of the Wild quality.