Too much blah blah blah, the J-20 has a smaller wing because the aircraft has a very long fuselage, if it would had a wing as big as F-22 in proportion it wing would be enormous, but draggier, thus the small wing is aided by the canards, thus reducing the need for an aft tail, thus making for smaller tail and making for a lower drag wing, the solution is quiet logic since the fuselage from radome tip to nozzle end is around 20 meters, while on the F-22 it is around 16 meters, the long fuselage requires a small wing to reduce drag specially since its wing is further aft than comparab;le aircraft like Gripen, J-10 or Rafale however your obsession that is a dogfighter is a dogfighter blinds you, with good engines it might have good sustained turn rates and good weapons and sighting systems will be like F-35