ΔE 8.2, close: similar, with a visible difference side by side. Gorthor Brown is a little darker, more muted than Burnt Sand.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Gorthor Brown is a little darker, more muted than Burnt Sand.
The same difference applies the other way round: Burnt Sand is a little lighter, more saturated.
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 Burnt Sand on the colour wheel See Gorthor Brown on the colour wheel
All matches: Burnt Sand equivalents · Gorthor Brown equivalents