ΔE 6.1, close: similar, with a visible difference side by side. US Earth Yellow is a little darker, cooler than Ares Flesh.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). US Earth Yellow is a little darker, cooler than Ares Flesh.
The same difference applies the other way round: Ares Flesh 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 Ares Flesh on the colour wheel See US Earth Yellow on the colour wheel
All matches: Ares Flesh equivalents · US Earth Yellow equivalents