ΔE 10.0, close: similar, with a visible difference side by side. Orange Brown is a little darker, cooler than Yellow Shadow.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Orange Brown is a little darker, cooler than Yellow Shadow.
The same difference applies the other way round: Yellow Shadow 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 Yellow Shadow on the colour wheel See Orange Brown on the colour wheel
All matches: Yellow Shadow equivalents · Orange Brown equivalents