ΔE 7.6, close: similar, with a visible difference side by side. Sand Yellow RLM79 is a little darker, cooler than Earth.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Sand Yellow RLM79 is a little darker, cooler than Earth.
The same difference applies the other way round: Earth is a little lighter, warmer.
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 Sand Yellow RLM79 on the colour wheel
All matches: Earth equivalents · Sand Yellow RLM79 equivalents