there is no lateral release in the heel, even in the old p series binding. the heel pivots along your tibial axis, putting less strain on your leg when its twisting out of the toe piece. the new heel accomplishes the same thing, the heel piece itself just doesnt pivot. functionally, they're designed to release the same, but the new binding is stiffer laterally, so it actually skis better. that being said, the PX jib has a rubber damping mat under the binding that doesnt really do shit, and the AXL2 binding has a bit of a lifter, that like shadows said, you'd never know the difference if someone didnt tell you. and to the guy who said rossi bindings on rossi skis double your warrenty, look bindings on rossi skis will too, seeing as how they have the exact same hole pattern and once the binding is taken off, you cant tell whether it was a look or rossi that was on the ski.