ChineseTiger1986
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F-22 has much better engine than J-20.
It's stealth, radar and avionics are also probably a little better as well.
Nope, the thrust and TWR are similar.
The only difference is that the F119 and F135 are more mature products, thus the lifespan is about twice as the long as the current WS-15.
The WS-15 will take few more years to match the lifespan of the best US engine.
Our aero expert has recently declassified many information about the WS-10B and WS-15 with authorization.