At true size, Greenland is about 1.2× the size of Indonesia. On the old 1569 Mercator map the same two appear about 13.6× apart — the old map exaggerates their difference by a factor of 11.8×.
It is a latitude illusion: Greenland sits near 73°, where Mercator multiplies area by about 11.8×, while Indonesia lies near 2°, inflated only about 1×. Equal Earth removes that latitude tax, and the pair settles at its honest 1.2×.