ΔE 20.7, loose: different enough that you should pick on purpose. Warboss Green is a little darker, warmer than Emerald Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Warboss Green is a little darker, warmer than Emerald Green.
The same difference applies the other way round: Emerald Green is a little lighter, 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 Emerald Green on the colour wheel See Warboss Green on the colour wheel
All matches: Emerald Green equivalents · Warboss Green equivalents