ΔE 15.9, loose: different enough that you should pick on purpose. Plague Toad Venom is a little lighter, warmer than Greenskin.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Plague Toad Venom is a little lighter, warmer than Greenskin.
The same difference applies the other way round: Greenskin is a little darker, 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 Greenskin on the colour wheel See Plague Toad Venom on the colour wheel
All matches: Greenskin equivalents · Plague Toad Venom equivalents