I'm sorry Henry....I don't mean any disrespect......However.
I believe that these two materials, virtually the same, are a type of wallpaper. Designed to be installed on the walls (sometimes ceilings). Not for covering cornicework.
Their designs wouldn't lend themselves to cornicework. Their thickness and ingredients (an easy to tear paper) wouldn't allow them to be stretched over the sometimes heavy curvature of a cornice without pulling away or shreding. And it would take a lot of cutting and customizing to get them to fit.