Hope everyone is have a good season....
Sean
Generally alpine boards have longer edge length and a bigger turn radius
than general-purpose boards. They are also narrower and are ridden with
forward stance angles, typically around 60 degrees. Furthermore, the
hard boots and bindings used provide a better interface to the board.
However the guys at extreme carving use further specialized equipment.
Their boards are a little wider than regular alpine boards (around 22 cm
waist as opposed to 18-20) and have sidecuts on the order of 12 m. The
wider board lets them run a little shallower angles on their boots, I
think typically a 50 degree stance. They also like bindings with good
lateral movement.
If you're interested in learning more about carving, the hard boot
community congregates in the forums at bomberonline.com. The tech
section of that website has a lot of good articles on equipment and
technique.
Neil