I agree, they look quite similar. The engines on 2021 we saw back might have been the actual WS-15. Unfortunately, I think he is banned from the J-20 thread indefinitely ... pity
Pakistan Defence
Figaro
Figaro
It also seems that his 210kN theory isn’t that ridiculous after all given that Jiang Hefu’s research paper on WS-15 core had a max thrust of 200 kN ... which was written in 2004. It wouldn’t be surprising if the WS-15 is actually that powerful
ChineseTiger1986
The non-sawed nozzle of the J-20 looks like the 3D TVC nozzle demonstrated by the ex-President Jiang Zemin back in 2004, and this was neglected by Deino several times. This one could be the WS-15-1, while the sawed nozzle is the WS-15-2.