ΔE 6.7, close: similar, with a visible difference side by side. Petroleum Brown is a little lighter than Golfag Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Petroleum Brown is a little lighter than Golfag Brown.
The same difference applies the other way round: Golfag 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 Golfag Brown on the colour wheel See Petroleum Brown on the colour wheel
All matches: Golfag Brown equivalents · Petroleum Brown equivalents