ΔE 8.2, close: similar, with a visible difference side by side. Bronze Brown is a little darker, warmer than Earth.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Bronze Brown is a little darker, warmer than Earth.
The same difference applies the other way round: Earth is a little lighter, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Earth on the colour wheel See Bronze Brown on the colour wheel
All matches: Earth equivalents · Bronze Brown equivalents