I have the GP1 on one bike, and the Specialized equivalent on another. I like the Specialized ones better. The same support, and slightly softer and more forgiving than the Ergons., paired with Specialized P2 Barendz, they are quite comfortable.
edit: an added benefit of the Specialized grips, - sizes, and colors.
Last edited by Wanderer; 04-22-16 at 07:17 AM.