All a myth created that the Sabres were superior - the IAF had more Hunters and Gnats than the entire PAF Sabre fleet and they are superior aircraft in most respects. The few A/A missiles the PAF had were extremely limited in employment. These are all just excuses peddled by Indian jingoistic historians and fanboys to make up for pathetic performance overall in any aspect.This is debatable, for the 1965 war. PAF had Sabres, while the IAF had a generation older air-crafts. And specifically with regard to "supplies" - I don't know about the PAF, but the IAF was woefully short of A2A missiles and ammunition, and had no early warning assets or surface to air defences at all.
1971 was a whole different ball game. The IAF not only had a decent SAM network and early warning grid, which enabled them to free up their combat aircrafts for offensive operations, but the PAF was reeling under the influence of sanctions from the USA.
Even the myth of the starfighter was exaggerated - but at the end nationalistic tendencies drive public narratives but not private ones otherwise the IAF would not have done better in 71.
But that doesn’t mean the PAF with its superior training and well rehearsed war plan fared any better in 65 and literally snatched a proverbial defeat from the jaws of total victory in terms of what it should have achieved because of dithering leadership and a few rotten eggs in certain posts.