ΔE 29.3, loose: different enough that you should pick on purpose. Necrosis Green Wash is a little lighter, much more muted, cooler than Poxwalker.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Necrosis Green Wash is a little lighter, much more muted, cooler than Poxwalker.
The same difference applies the other way round: Poxwalker is a little darker, much more saturated, 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 Poxwalker on the colour wheel See Necrosis Green Wash on the colour wheel
All matches: Poxwalker equivalents · Necrosis Green Wash equivalents