Remember, the context of my original comment was on defensive maneuvers, of which both missile evasion and energy recovery are included. You’re never going to sustain supersonic speed, and you wouldn’t want to, while positioning to get a shot off, but the moment you’re on the wrong end of a lock or you’re at risk of being out maneuvered, regaining energy is your number one priority.If by “dogfight” you mean within visual range/at or post merge then you are very much incorrect. Most BFM/dogfights are at full afterburner post the initial turn. Energy is gained by easing the turn but this will lose you turning rate or blow out the radius, so it’s a delicate balance between rate of turn and energy lost/gained.
Where a TVC J-20 is going to be advantageous over non-tvc is in the slow fight. Just like the TVC Flanker.