you must not have played '08(or '07 on 360) that much.
the Commentary is basically the same, yes. i have heard a few lines that are new, nothing huge different.
the Presentation, yes, basically the same. really only thing i see changed in presentation is overlays.
Animations? they are better than '08. a lot smoother.
Graphics are better, like the player models and field texture, not to mention the snow games are actually playable this year('08 the snow was just a white solid color blanket).
there are other features that were added as well.
theres not a whole lot you can get out of videos though, need to actually play the game.