ΔE 10.9, fair: the same colour family, but not a straight swap. Earth Green (Early) is more muted, cooler than Uniform Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Earth Green (Early) is more muted, cooler than Uniform Brown.
The same difference applies the other way round: Uniform Brown is more saturated, 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 Uniform Brown on the colour wheel See Earth Green (Early) on the colour wheel
All matches: Uniform Brown equivalents · Earth Green (Early) equivalents