John,
Try Unique Photo, they are located in Fairfield, NJ.
http://www.uniquephoto.com I have had better luck on selection and price with them. They will also ship chemistry which B&H does not. There is also an outfit in Rochester, NY (I cannot think of their name at the moment but others here will know) that I have bought from with good results. Unique lists a few types of Endura roll paper.
The difference between Ektacolor Edge and Royal is the paper weight. Royal is about twice as heavy as Edge and more like the base of the boxed Endura that I have. Edge and Royal are supposed to be the same emulsion.
I have both Royal and Edge papers. For a "consumer" paper they are both quite nice. Their colors are bright but not in the way that I find Crystal Archive to be almost over-saturated. To me, they are both nice but the Kodak has a more "natural" look.
-- Jason