Last week it was Philadelphia's 3 turnovers that was the difference. This week it's penalties; the Ravens committing 13, giving up 100 yards (35 assessed against the last drive of the game which had three penalties in less than 2 plays; two for unsportsmanlike conduct at 15 yards each after the Gaffney touchdown and one for an offsides on the extra point) to the Patriots 4.
Whatever else you can say about the Patriots run, it's entertaining viewing. Much more engaging than, for example, this year's baseball playoffs (possible exception of Cleveland/Boston series).