Comparing: Cruiser Mk. II vs. Cruiser Mk. IV vs. T-127

The A10 Cruiser Mk. II was a further development of the A9 modification designed by John Carden. The A10 had enhanced armor and no machinegun turrets. A prototype was built in July 1937 and adopted for service as a heavy cruiser tank. A total of 175 vehicles were ordered between 1938–1939, which were manufactured by September 1940. The vehicles saw combat in France (1940), Greece (1941) and North Africa (1941).

An upgraded version of the cruiser tank Mk. III. The tank featured armor enhanced by the additional screens. The Cruiser Mk. IV fought in France in 1940 and in the early stages of the North African Campaign. This vehicle last saw action in the winter of 1941–1942. A total of 655 tanks were mass-produced.

Developed together with the T-126 at Factory No. 174 during the summer of 1940. Vehicle development was suspended during the preliminary design phase and then discontinued due to problems with the V-3 diesel engine.