[Mynameishappy]

Reading the article I assumed the issue in choosing was one of "support" for the planes in the instance of war. India is more likely to go to war with another US ally, Pakistan, and the US would probably support Pakistan, or at least withhold or delay support for India in a conflict with India based on its historical strategic ties to that country. So India would be at a disadvantage with US equipment. The same is true if India has a conflict with China. Russia and the Europeans are probably more willing to give India a better deal on fighters because of the chance of seeing the equipment in combat against Pakistan's US equipment.