ΔE 17.7, loose: different enough that you should pick on purpose. Eau de Nil “D.E.G.” is noticeably darker, cooler than Pestilence Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Eau de Nil “D.E.G.” is noticeably darker, cooler than Pestilence Green.
The same difference applies the other way round: Pestilence Green is noticeably lighter, 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 Pestilence Green on the colour wheel See Eau de Nil “D.E.G.” on the colour wheel
All matches: Pestilence Green equivalents · Eau de Nil “D.E.G.” equivalents