agent 130 is same shell as the diablo race pro, the agent 100 is the same shell as the dragon i believe.. Dragon is a new fit this year, replacing the Diablo Magma of years past. I am trying to remember correctly form when I had my feet in next years boots, but i felt the Agent 100 felt like junk compared to it's supposedly "twin" boot of the Dragon.....might have been the other way, but.....as far as the Agent 100, wait to get your foot in it. The Agent 130 is what I will be riding next year, that boot is all business so if you are looking for a stiff narrow fit race boot, it's worth checking out.