extremes are stiffer and heavier than the disorderly.
the extremes  of course have a different sidecut and is based more for an all mountain/park skier, while the disorderly's are made for a park skier
if you ever felt or skied the k2 public enemy, thats what the extreme is based off of. take the weight off of the tip and tail, add i bit more flexibilty, and make the public enemy's lighter and tada, you have the extreme