I confirm you that the seats are rather the same (and already a bit dated).
There were even some (good and recent) French films!!
When I flew from Beijing to Shanghai with China Southern Airlines in First class, I had this seat.
I have to say that the service was really excellent (but the Chinese breakfast was not exactly excellent)
The P class was nearly full. My neighbours were mainly communist apparatchiks and one Chinese teenager .
The lounge in Beijing was even worse than in SVO. Check-in was very smooth (one dedicated counter for J and P passengers for Air China and China Southern Airlines; fast security lane).
Unfortunately I had only FB 200% bonus