Nearly a tie: Greenland and Kazakhstan differ by barely -21%% in area — about 2,154,754 km² km² against 2,712,747 km² km².
Greenland sits in North America, Kazakhstan in Asia. On the old Mercator map the latitude gap distorted how large each felt beside the other; at true size the answer is simply 0.8×.
The old map muddied it further: Mercator inflates Greenland about 11.8× and Kazakhstan about 2.3×, so on a Mercator-style map this pair appears 4.1× apart instead of the true 0.8×.
Kazakhstan fits 0× into Greenland.