Following are the difference between short circuit and overload:
(a) Short circuit occurs when there is a fault between the line to earth while overload occurs when an equipment draws excess current from the supply.
(b) Short circuit usually takes place when neutral and live wire touch each other while overload occurs when the number of devices joint in a single socket are more.
(c) During short circuit, the current is high whereas in overload, the current is comparitively low