I honestly do not see how

  J11 aircrafts already use the WS10A as its standard. And the J20 is using a super cruising engine with saw tooth edges in order to reduce its radar cross section. I could not imagine there being much else to offer that would improve China's combat efficiency.

Xu Yongling, one of China's top test pilots, told the Global Times that the J-20 possesses an advanced supersonic cruise ability and powerful air mobility that are technological breakthroughs for the country.

   While I am not a big fan of super cruise, that and the visuals we have of the engine would mean this is an entirely new turbofan.