All is better/bigger than the original: the intensity of the story, the production design, the camerawork, and the car chase. All performances are either good or beyond, if we don't count Karl Urban (the Russian assassin).
My favorite bit of performance is given by the guy playing the assassin Bourne duels early in the movie. Another well-directed one is the kid of the murdered Russian couple. Joan Allen is as good as usual (not one wrong move). Matt Damon does even better than in the first movie and so does Julia Stiles.