I think the edge is in favor of the Vikings. Philadelphia has a solid defense but it was so much better with Wentz because they weren't in the field as much. Loving a QB late in the year is harder to overcome than loosing one early in the season. Vikings won most of their games with Keenum, not true for the Eagles.
Vikings may not have looked great int he 2nd half against the Saints, but remember, they are playing against a future HOF QB in Brees. He made adjustments like all the great ones do.
One possible downfall for the Vikings is it's an outdoor game at night. Weather may become a factor. There is no doubt loosing Wentz at that time of the year was a bigger problem for the Eagles than the Vikings loosing Bradford early in the year. At this time of the year none of the games are easy.
Also find it interesting that so many fans are tired the Patriots winning, yet get so excited that NDSU has won 6 out of 7 National Championships. Me included.