Comparing: Kirovets-1 vs. AMX 50 100

The Kirovets-1 project (IS-3, prototype No. 1) was developed from July through November 1944. The prototype was built at the Chelyabinsk Kirov Plant in September–October 1944. From December 18 through December 24, 1944, the vehicle underwent trials at the NIBT proving grounds in Kubinka. After it was decided to manufacture a pilot series of the modified IS-2 with a hull proposed by engineers of Plant No. 100 and Сentral Research Institute-48, the work on the Kirovets-1 was discontinued.

The AMX 50 100 heavy tank was a further development of the M4 project. The first prototype was built in 1949. The 55-ton vehicle featured a 100-mm gun in the oscillating turret. The prototype was tested with gasoline and diesel engines from 1950 through 1952. The vehicle never entered mass production nor saw service.