This is just pedantics at this point. All I wanted to express was, if the PLA holds back equally when displaying both the J-20 and J-10B, then it follows that the J-10B is more maneuverable than the J-20. More maneuverable as in, there are maneuvers that the J-10B is capable of that the J-20 isn't. Perhaps impressive was the wrong word.
No, this isn't semantics.
Look, if you genuinely believe that in good faith, I will explain to you why the J-10B TVC performance does not make it "more maneuverable" than J-20.
A) The J-10B TVC performance was very standard low speed TVC maneuvers that is normal for any TVC equipped aircraft to be able to do. It isn't showing anything unique. I.e.: it is being "held back".
B) J-20 performances we have seen are also very standard maneuvers for a non-TVC equipped aircraft. I.e.: it is being "held back".
What A) and B) together mean, is not that "J-10B TVC is more maneuverable than J-20".
What it does means, is that "carrying out low speed maneuvers for J-10B TVC is a standard maneuver for J-10B TVC (or indeed any other TVC equipped aircraft) and is expected and thus not needed to be held back, but such low speed maneuvers are less expected for a non TVC equipped aircraft like J-20 (or indeed, J-10C, J-11B, J-16, J-35A, J-15T etc)".
So, the conclusion isn't that "J-10B is more maneuverable than the J-20".
Instead, the correct conclusion is "J-10B TVC (or indeed, any aircraft with TVC) is more maneuverable (particularly post stall) at
very low speeds than non-TVC equipped aircraft".
The "very low speeds part" is vital.