According to a quite known military insiders, recently there are some military excersise between J-11B and J-10A at West China, and J-10A beat J-11B easily. so now J-10A basically have defeat all Su-27 families in China, even the J-11B, which should have at least comparable electronic upgrades as J-10A.
The insider also claimed J-10B's A2A performance is (surprisingly) considerably better than J-10A, the PLAAF is quite satified with J-10B until they get J-20.
And there is alot of other info in that informative thread:
Due to the A2A performance gap between J-11 and J-10, the rule has been set for PLAAF's military competition between different divisions to only count these results between same-type fighters' dog-fights.
J-10 vs J-10 and Su-27 vs Su-27, whilst the match between different types of fighters are only count as friendly match.
Also due to the poor performance in these open competitions, PLAAF's 1st Division (stationed at Shenyang) have been critized by the boss of PLAAF, the commander of PLAAF suspect the training methods 1st Division employed has fundemntal flaws, and demand the commanders of 1st Division to improve their training approaches urgently.
Whilst Airforce divisions from Chengdu consistently outpeformance divisions in Shenyang, so I guess CAC really make the airforce divisions around them stronger, CAC vs SAC 2:0 now, just kidding.