ΔE 6.0, close: similar, with a visible difference side by side. Mustard Brown is a little darker, warmer than Driftwood Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Mustard Brown is a little darker, warmer than Driftwood Brown.
The same difference applies the other way round: Driftwood Brown is a little lighter, cooler.
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 Driftwood Brown on the colour wheel See Mustard Brown on the colour wheel
All matches: Driftwood Brown equivalents · Mustard Brown equivalents