I think Manning. No one ever thought ACL ends a career anymore. We all expected Charles and AD to comeback. True I thought they would need a half a yr to get back into the groove. The fact they both played well early was a bit of a surprise.
But Manning people thought he was done, lots of NFL people felt that his neck was too damaged to play. So I think because neck injuries so serious and hard to come back from, that manning has the edge right now.