I received a package of 8x10 and 11x17 photo warehouse film a little while ago, but I am waiting on the pictorico that I bought from Brian to get here. I figure the best way to see how comparable they are is to print the same image one after the other onto each and see what they look like. I will report back here the outcome. Once my UV box is finished (maybe tonight if I have the time!) and my chemicals are in I will make prints from each negative to see if the substrate affects the UV transmission and by how much.