I agree. I only wanted to be specific in this event. Plate toughness is not hardeness. The harder surfaces of soviet armour (esspeccially cast) is prone to cracks from high velocity projectiles, which otherwise would not defeat the plate. The soviet armour plate is harder but not tougher. One should keep in mind armour production technicques. Very hard surfaces, which are not treated minutely tend to produce bubbles, which are not much of a problem in cast plates but in rolled ones they are flattened out over a much wider area and thus act as laminations (gaps between layers), which tend to snap the plate into two if hit.
It would- however- be totally superior against any form of uncapped projectiles, which shatter against them but by then all had hard capped APCBC´s. Still, the SU tested their plates on the trial ground still at wars end against their UNCAPPED projectiles, hence the preference for extreme hardeness. Had they tested against capped APCBC rounds, they would soon see the problem...
