realskiers

Lange's were (not sure if they still are) what are sometimes called rotary boots.  As the boot flexes, the boot's hinge alignment forces/rotates your knee to the inside.  This would probably contribute more to the feeling of having "more edge" than the difference in the boot board(Zeppa to Gary)

Other than quite a bit of "forefoot varus" I have a very neutral alignment.  When I was last looking at boots, I was trying on a Lange and a Head and checking alignment.  You know, the routine where you stand on the platform and they use a framing square to locate the center of mass of the knee when upright and when flexed.  With the Head boots, I tracked straight forward.  With the Lange's I tracked 1 degree to the inside.

It was amazing to me (but not totally surprising) that they saw that as a Jim alignment problem rather than a boot difference, even though the difference seemed pretty obvious to me.  But I should also confess that I wasn't really interested in the Lange boots, I've got too much "rotary" in my turns already without the boot adding to it.  I was just curious.

Note that I'm not making a judgement between the different brands, I just find all of the little subtleties very interesting.