I had always heard Soviet submarines were noisier than their counterparts in western navies. Annoyingly wherever I saw this likely true but of information stated it offered no explanation as to why this was aside from the USSR was terrible and the US of eagles rules and has the best stuff.
Recently however I was watching a sub brief video (an excellent YouTube channel) and he said the Soviets doubled up most things in their subs. Leading to twice the noise and adding great difficulty in isolating components to silence.
This seems logical to me, but is there anyone else who has a similar theory to explain things? Without making it seem that the USSR was hopeless and could not hope to compete with the might and brains of the US because they were commie pigs? I know the Soviets often were playing catch up to the west, but this often seems over blown and doesn't actually explain why.