the Dri-rider tend to be longer jackets. The Ixon stop at the waist like most leather jackets. As the waterproof liner is inside the jacket the water gets through the jacket, stops at the liner and the runs down your body...to your pants, which then get wet.
I personally think a set of wets does a better job than relying on a jacket to be waterproof. You have your wet weather pants and jacket and nothing gets through!
The mesh jackets rock in summer though.