ΔE 6.4, close: similar, with a visible difference side by side. Plague Brown is a little lighter than Golden Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Plague Brown is a little lighter than Golden Brown.
The same difference applies the other way round: Golden Brown is a little darker.
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 Golden Brown on the colour wheel See Plague Brown on the colour wheel
All matches: Golden Brown equivalents · Plague Brown equivalents