Endura Premiere is nowhere near the same animal as Supra Endura. It too suffers from egregious crossover and Ultra endura-like saturation and contrast.
I very much doubt that Freestyle, notorious for their huge mark-ups on kodak products, would be cutting, branding and packaging Endura Premiere, kodak's current professional ra-4 paper, only to sell it for a fraction of the price of what they charge for the fuji paper. My guess is that it's kodak edge, which is only marginally better than the lousy fuji cut-sheet product. How does the thickness of the paper compare to the fuji ca ii?