ΔE 11.1, fair: the same colour family, but not a straight swap. Grey Brown is more saturated, cooler than Woodstain Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Grey Brown is more saturated, cooler than Woodstain Brown.
The same difference applies the other way round: Woodstain Brown is 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 Woodstain Brown on the colour wheel See Grey Brown on the colour wheel
All matches: Woodstain Brown equivalents · Grey Brown equivalents