Any M4 that the Soviets would have dealt with would have been early models that the allies would have been most willing to give away. The Sherman also would not be suited for the Russian forces. It required more training to use effectively and to maintain. The tracks were also like those of the earlier German tanks. Too narrow and unsuited for the terrain.

If you were to give a few Pintos to the Soviets in 1980 and let people drive them that were use to the Yugo, I would suspect that you would get much the same response as comparing these two tanks.

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Lord, let me be the person my dog thinks I am.