ΔE 11.1, fair: the same colour family, but not a straight swap. Earth Green (Early) is more muted, warmer than Russian Green 4BO.
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, warmer than Russian Green 4BO.
The same difference applies the other way round: Russian Green 4BO is more saturated, cooler.
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 Russian Green 4BO on the colour wheel See Earth Green (Early) on the colour wheel
All matches: Russian Green 4BO equivalents · Earth Green (Early) equivalents