i want to know what characteristic is different between Alaskan Husky  and  Alaskan Malamute?

Alaskan Huskies are a type rather than a purebred.  A bit like Lurchers.  They are bred purely for racing, and often have other breeds blood in them.  Selection criteria is work only.  It seems that Pointer blood giving shorter coats is popular in Europe.

An Alaskan Malamute is the draught horse of the sled dog world.  Large and strong and not designed for sprinting.

Have a look here: http://www.lusitano.dk/AlaskanHusky/races.htm

As Brainless says. The words chalk and cheese also spring to mind!