The clear display material has a Dmax similar to Ektachrome but the "frosted" material has higher Dmax AND Dmin. This is due to the "frosting" material that makes it semi opaque. The "similar" Dmax is about as far as the comparison can go due to issues of sharpness and grain (induced, in part, by the "frosting" material).

These images are designed to be viewed in huge displays and from a distance. Not up close and not projected from small images into huge images. See Steve's comment above for more on this.