Much of the J-10 technology is not released to public, the specification of its avionics, situational awareness, and BVR capability would be relatively lower, unless China has taken the real edge in the past few years, but not many of its success stories have been reported.
We all know the specifications of F-16s, they are very good aircrafts and have excellent avionics and situation awareness, as well other things like ECM suite. What concerns us all as of now is what weaponry would come up with the aircraft as well as which radar will be equipped.
If Pakistan can get new F-16s with APG-63 (V2) AESA radar with Aim-120 C7 or Aim-120 D, we will gain the technological edge against any fighter in the Indian inventory, due to superior avionics, effective BVR capability as well as relatively low RCS.
My guess is that J-10 is only being bought to have a relative ratio of 50-50 percent Chinese and Western technology in PAF. What i have always thought about was that J-10 would come in the future no matter what and it will be given to Squadron # 16 and Squadron # 26 taking the place of A-5 aircrafts, while being a good air superiority role fighter.
As far as the future goes, we might see J-XX (J-13/14) or Rafale/Typhoon as the main aircrafts to go to Sargodha.