It's just Ghazi Raiders in the matchup. You have a better, more efficient cavalry unit, alongside mass spearmen.

The Keshik are stronger, but they are slower as well, so catching up to Ghazi raiders is not feasible for them.

In theory, Mongols are better in feudal age. They have access to the Keshik, which is better than the Ghazi Raider – it's stronger. But the mass is a problem. The free upgrades are a problem. And the healing from the scholars is an even bigger problem than all of the other factors.

The free scholar from the first mosque or dock can be used to heal against early Khan harass, nullifying the poke damage.

Against Mangudai, Delhi needs both Ghazi Raiders and archers to deal with them effectively.