ΔE 26.9, loose: different enough that you should pick on purpose. Full Healing is noticeably lighter, much more saturated, warmer than Malignant Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Full Healing is noticeably lighter, much more saturated, warmer than Malignant Green.
The same difference applies the other way round: Malignant Green is noticeably darker, much more muted, 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 Malignant Green on the colour wheel See Full Healing on the colour wheel
All matches: Malignant Green equivalents · Full Healing equivalents