PAF and IAF had Sabre and Hunters respectively before PAF inducted F 104 in their 9 Air Superiority squadron.
Total 12 F 104A/ B starfighters inducted which were different from other variants.
Historically speaking PAF was also the first to induct 4 Gen Jet (among other weapon systems) in early 80s, first in Indian subcontinent. With few customers already in line for their JF 17 Kamra (PAC) will be busy for years
So no surprise here.