An example which caught my eye today: The video/DVD for Kill Bill Vol. 1 (the yellow one) has the sword diagonally away from Uma Thurman. The poster for the video in the shop has her royaying her wrist 180 degrees, so that the sword passes in front of her leg. Why the difference? Which is better? Well, a part of the difference is that a DVD cover has different proportions to a poster, and has more lettering than just the movie title.