CHINA’S NEW CARRIER-BASED AIRCRAFT PERFORMANCE WILL EXCEED THE "SUPER HORNET"

[SomeGuy]

The engine thrusts you gave were AFTERBURNING thrusts. The Al-31 dry thrust is lower than that of the F414.

Dry thrust of Al-31F and WS-10A is still higher than dry thrust of F414.

62.3 kN F414
74.5 kN AL-31F
89.2 kN WS-10A

The J-15 was developed from J-11B, yes? Then it would weight at least 23,926 kg. With the addition of canards and carrier arresting equipment, I would expect the weight to increase. Fuel payload might also be increased since it's a naval aircraft.

Use of composites will help keep weight down.
Besides, J-10C would also need similar modifications that would increase its weight.

The Su-37 has TVC engines and advanced fly-by-wire system. J-15, as of the prototype, doesn't have TVC. The Su-37 also has an extremely powerful engine (with afterburning thrust of 145 kN). This will ensure a high thrust-to-weight ratio, which allows such maneuverability to be achieved.

How about this vid. J-11B doing some Cobra manoeuvers.

YouTube - J-11B XTREME SUPERMANEUVERABILITY