Soviet naval engineering was far superior during the Cold War in terms of hard material engineering stuff, but they basically always lagged behind in soft systems like electronics and fire control other than some more basic stuff like radar where it was relatively even. This superiority in engineering and construction also only emerged mid Cold-War. WWII era Soviet metallurgy was bad when it came to naval production, armour plating quality was sub-standard and there weren't really facilities capable of building the armaments needed for the Soviet Navy's planned capital ships. Kuznetsov was very against the construction of the Stalingrads partly for this reason, because he wasn't confident Soviet shipyards would deliver them to standard.