ΔE 10.1, fair: the same colour family, but not a straight swap. Death Guard Green is cooler than Russian Uniform Lights.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Death Guard Green is cooler than Russian Uniform Lights.
The same difference applies the other way round: Russian Uniform Lights is 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 Russian Uniform Lights on the colour wheel See Death Guard Green on the colour wheel
All matches: Russian Uniform Lights equivalents · Death Guard Green equivalents