Comparing: T26E4 SuperPershing vs. STA-2

To increase firepower, a new long-barrelled 90-mm gun was mounted on the T26E1 in January 1945. The prototype was designated the T26E4. Development was discontinued in January 1947 due to problems with the gun and the loading mechanism. A total of 25 vehicles had been built by that time, but never entered service.

One of the first Japanese post-war tanks was developed on the basis of U.S. vehicles, taking into consideration Japanese terrain, rail network specifications, and the smaller stature of Japanese tankers. This variant prototype featured a shortened suspension and a larger hull height. A total of two prototypes were built.