Comparing: T26E4 SuperPershing vs. Panzer 58

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.

Swiss project of a medium tank with improved combat characteristics and the ability to fight in mountainous terrain, developed in 1953. The plans called for using the gun from the British Centurion tank. A total of two prototypes and ten vehicles were produced, but the vehicle never saw mass production.