You guys know I'm incredibly supportive of everything anti Mooz, but here, I have a feeling Azerbaijan has got an advantage with a war lusted country's backing and Russia's choked reach to Armenia. Also, Armenian troops are pretty weak, in equipments as well as training while Azeris have a more varied roster of countries with which they train and are well equipped.
Also, higher GDP, marginally more soldiers (less conscripts, more professionals) and a higher number of vehicles...
Azeris have a better chance of winning unless Russia openly starts smashing Azerbaijan's north border which seems highly unlikely.