PAF has more access to western techs than PLAAF, so they might be able to make J7 more capable with better techs than F7, or JF 17 better than FC1, but does that also mean that they have better techs than their IAF counterparts? Are PAFs J7 able of BVR combat like Mig 21 Bisons?
Or JF 17 for example, it should get Grifo radar, SD 10 BVR Missile (maybe Mica), rumors talked about M88 (75Kn thrust), but now it has RD93 engine that could be upgraded to 90 Kn thrust.
LCA instead should get Elta 2052 AESA, Astra and latest R77missile, has GE 404 with 85Kn thrust and should get upg GE 414 (over 100Kn), or EJ 200 (90 - 100Kn) with TVC.
And now think about the techs that will be available for PAF if they get a copied Russian Flanker.
Who will provide PAF better techs than BARS PESA radar, OLS 30, or latest AL 31/41? China can't, that's why they got Su 30 MKK and keeps the Flankers upgraded with Russian techs. Russia and Israel won't and the western countries can only offer avionics and maybe some weapons. So at the end a hypothetical PAF J11 might be better that PLAAF J11, but like maverick2009 said, it will remain inferior to MKI. Not because MKI is unbeatable, but because of inferior techs.
IAF MMRCA can only be countered by PAF with J10B and a capable AESA radar, or by purchasing other latest MMRCA like Rafale, or F18SH.