According to my simple way of thinking, and it's served me well over the years, and with thousands of bows...
I've used both, and when I use the Bear paw glass I shoot for a draw weight about 6# more than I need. Saying, if I was making a bow with gordon's glass, and on a particular design, a .340" stack gave me a 50# bow, I would use that same .340" stack to get a 44# - 45# bow, of that same design with bear paw.
Also if you really need to hit a certain weight for one reason or another, and you decide to use a product you haven't used yet, be it carbon, a different sort of glass, or bamboo as opposed to wood, just make the stack around .005" - .010" thicker than you think you'll need. Because you can more easily make a bow that's too heavy lighter, but you can't make a bow that's too light heavier, without making it shorter, or gluing more glass on the back.