Well, don't believe the hype.Baryta Prestige has some OBAs in it, for starters. That is not a deal breaker for everyone, but its not a great sign. Harman Baryta is a rarity with some OBAs, but still good longevity. Very few papers achieve this, maybe this is one, maybe not. I'll stick to Platine till the longevity test results are in.
The relatively new Canson Baryta Prestige is a heavy paper. Any heavier and the built-in cutter might be an issue. I buy rolls only, and even in roll form, this paper is surprisingly flat after printing. (I use the Epson P9000).ken