ΔE 27.1, loose: different enough that you should pick on purpose. Warcry Green is noticeably darker, more saturated, cooler than Nurgling Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Warcry Green is noticeably darker, more saturated, cooler than Nurgling Green.
The same difference applies the other way round: Nurgling Green is noticeably lighter, 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 Nurgling Green on the colour wheel See Warcry Green on the colour wheel
All matches: Nurgling Green equivalents · Warcry Green equivalents