I know what you mean, but I'm not sure any of those scores are posted in the context of the score of any other game, even previous Maddens:
It appears as though each game is scored on a scale of 10 based on the reviewer's discernment of how close that game came to perfection within the context of itself, thus the recently proclaimed battle cry of "You can't judge a game based on what's not there, but was IS there." (Haven't we heard that alot lately?)
If am correct in my analysis, it is then possible for Madden to score higher than either MLB The Show or NBA 2k, which would not be AT ALL to say that the reviewer believes Madden is better than either of those games, but that, within a different dimension or paradigm of computer gaming, AI logic, fun factor and sporting rules (among other intangibles), Madden 13 is within itself inherently frozen in time (by time) short of perfection at an 8.5, never to be moved higher or lower by the failures or successes of any of its predecessors or successors, much less by another game by another publisher in another sport in another point in time. And time is critical in how we perceive technological advancements, failures or innovations...whether it be concerning hardware or software.