to popeye, this is a photo of the latest 636M that China purchased. I'm not sure what you can make out of this.
According to this Kanwa article, 636M uses a lot of the latest electronics Russians put on Amur, so you can get an idea of the electronics on it I guess.
The Yuan sub's electronics was talked about a little bit in the front.
As for 093, I personally think we can expect it to be initially equivalent to later models of Victor III, because China got a lot of help from the Rubin on this proejct. According to that Taiwanese military magazine, the noise level of 093 might be 130 db, but can be lowered to 110 db later. Also, it uses engine that can cool, so it can go at over 40 knots. Think about it this way, if you equip a fighter from the 60th with 90s avionics, it would be better than planes from the 70s. Same case here, the hull might be from 30 years ago, but the other components used are pretty up to date. The decline in 094 is expected to be even more dramatic (165 to 120).