“..but their new classes of sub are on par with US subs”
Umm....No. Their newest stuff, is their old stuff, that they couldn’t bring to production, let alone become operational.
They have about 70 total subs, mostly designed in the 70s and early 80s. They have about 7 subs of newer design, that are completely inferior and louder than our subs.
Take it up with the US Navy that’s their assessment. You are wrong according to the Navy about how inferior and loud they are. Sorry am doing other things here and have no time to supply oinks - look on Defense One, War zone and others