In late 1944, the IS-2 was upgraded to the IS-3. This tank had an improved armor layout and a hemispherical cast turret which would become the hallmark of post-war Soviet tanks. Despite having thicker armor, it was lighter and stood 30 cm less. This tank is somewhat of a Soviet counterpart of the King Tiger. It is however lighter, faster and more maneuverable, making fast movement around the battlefield possible. The tank is also smaller which aids mobility in urban areas.