ΔE 21.6, loose: different enough that you should pick on purpose. Viridian Green Hue is a little darker, more saturated, cooler than Nurgling Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Viridian Green Hue is a little darker, more saturated, cooler than Nurgling Green.
The same difference applies the other way round: Nurgling Green is a little 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 Viridian Green Hue on the colour wheel
All matches: Nurgling Green equivalents · Viridian Green Hue equivalents