According to Yankeesama J-10A defeated the Gripen pretty thoroughly in WVR and BVR engagements in 2017. I assume that J-10B/C will have a greater advantage.
Oldest variant of J-10 being able to defeat Gripen in BVR is impressive without knowing the finer details but PLAAF also aims to match USAF, the BVR specialist, so maybe it's not that surprising. Again the finer details of the exercise matter.
WVR, pilot skills factor in quite a lot more. So in an even playing field just between individual or small, equal numbers of fighters, it'll be far more down to the pilot. Over time, I've grown to appreciate why RAF Typhoon pilots have said that no self respecting pilot aims to fight WVR despite Typhoon being one of the best WVR fighters. PLAAF should continue to focus on the BVR fight. J-20 going gunless sort of points towards PLAAF thinking and working towards BVR being where the battle is fought and won/lost.