MRCA has been going on for a long time now, so its always premature to say anything.
F-16 A/B is different from F-16 C/D and E/F and beyond in structure however avionics can be upgraded.F-16 A/B is more agile than later versions which are better in avionics etc.
PAF has is getting C/D now and has experience with E/F thru UAE.
The most likely winner can be F-18 or Mig-35. followed by EF and the Rafale.
PAF is getting Mi-17 and bell series choppers constantly.