It's more complicated since we operate multiple blocks of Vipers and each block has different kinematics. Block 50 Vipers are overloaded with a lot of extra weight spread over the same wing area. I was just listening to an interview with a Eurofighter pilot, he confirmed that the hardest dogfighter he faced was an early block Viper (compared to late block Vipers, Eagles and Hornets.) So Block III with the upgraded engine may actually match our Block 50/52. However, our early block Vipers are still going to have the best kinematics. In terms of BVR though, the Block III will be far ahead of all our Vipers.
I suspect the Block III will be used for air superiority, since they will be replacing the remaining F-7 "air superiority" squadrons. The Block IIs will retain their multirole, along with our Vipers. Even the Block 50/52 will be multirole, not air superiority, since they have the best payload and range, which is more useful for strike/CAS. Fifty Block IIIs spread over several squadrons, with a dedicated Air Superiority role would be a massive upgrade for the air-to-air potency of the PAF.
I suspect the Block III will be used for air superiority, since they will be replacing the remaining F-7 "air superiority" squadrons. The Block IIs will retain their multirole, along with our Vipers. Even the Block 50/52 will be multirole, not air superiority, since they have the best payload and range, which is more useful for strike/CAS. Fifty Block IIIs spread over several squadrons, with a dedicated Air Superiority role would be a massive upgrade for the air-to-air potency of the PAF.