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.