Wow. That is a HUGE change, as especially for the Welterweight, and light Welterweight divisions. The size of the glove will definately change the dynamic of the fights. Fighting with 8oz gloves at 147 and 10oz gloves at 154, I can honestly say that at 147 you can feel the punches more, even though its at a lighter weight. I think thats why we see so many KOs and KDs in those divisions.