As everyone else said, the paddle is just thicker on the extremes compared to the haulers. I highly doubt the paddles will rip off from the base anytime soon because the actual paddle is literally twice as thick. With the haulers, you can fold the paddle back with your hand, but with the extremes, that's almost hardly possible.
I run a 7 paddle extreme on my YFZ and it HOOKS up. I think 8 would be way too much bite though for me personally.