Not every game sells millions of units.
MS and Sony are about equal in 1st party. I give the edge to MS becuase of Halo and Gears, but others prefer ND games. So superior 1st party is subjective.
isn't halo/gears made by completely dif ppl now? I expect the quality of those games to go down imo... I think their last games did....
to the o.p,already been pointed out it costs more/and takes longer to make games,and of course sony cranked out quite a few games in the last 12-18 months of the ps3(before the release of the ps4), also forgot reso-gun