Nearly a tie: India and Kazakhstan differ by barely -14%% in area — about 3,155,807 km² km² against 2,712,747 km² km².
Both sit in Asia, so this is a same-region comparison: the new Equal Earth map draws both with the same honest geometry, and the real gap is exactly the 0.9× you see above.
The old map muddied it further: Mercator inflates India about 1.2× and Kazakhstan about 2.3×, so on a Mercator-style map this pair appears 1.7× apart instead of the true 0.9×.
India fits 0× into Kazakhstan.