ΔE 6.9, close: similar, with a visible difference side by side. Pale Brown is a little darker, more saturated, cooler than Bright Brown Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Pale Brown is a little darker, more saturated, cooler than Bright Brown Grey.
The same difference applies the other way round: Bright Brown Grey is a little lighter, more muted, 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 Bright Brown Grey on the colour wheel See Pale Brown on the colour wheel
All matches: Bright Brown Grey equivalents · Pale Brown equivalents