SAM is good against high flying threats.Hence SAMs come into equation. Pakis will be facing s400 shadow inside their own aur space and a formidable wall of akash , Barak, qrsam etc.
Chinese will face all these plus Himalayas terrain and disadvantage of lifting off from tibet .
FYI- in these case also both Pak having little advantage & chinese huge advantage.
Common advantage - long range vlo cruise missile, large no.of stand off weapons & sead/dead weapons
Pak- they also having long range sam.
Chinese- large no.of long range sam, huge amount of longe range weapons. air launched long range weapons, j20, stealth drone, high altitude site for sam. Himalayan terrain is not a issue for chinese, but for us.
Lifting off from tibet- they are having better lifting capability compared to us, and better infra also.
They are having large no.of heavy lifters & tankers.
According to IA - chinese holding better areas in ladakh [plains] and some high altitude area also. Chinese already shown they can bring huge military into lac in a short period of time, and each day they are improving their infra.
Chinese trying to match US & india trying not to fall behind pakistan.
Pakistan is a real threat, they don't care about their country or economy or people, if they think attacking india is good, then they will do it, on the other hand chinese export 100b$+ items to india with out any import pressure, and they never do anything stupid to damage their exports.
Falling sqn strength is a major issue for iaf. Iaf also lacks cas aircraft - retired all mig27.