ΔE 15.5, loose: different enough that you should pick on purpose. Uniform Brown is more saturated, cooler than Gorthor Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Uniform Brown is more saturated, cooler than Gorthor Brown.
The same difference applies the other way round: Gorthor 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 Gorthor Brown on the colour wheel See Uniform Brown on the colour wheel
All matches: Gorthor Brown equivalents · Uniform Brown equivalents