ΔE 9.8, close: similar, with a visible difference side by side. Feral Green is a little darker, more saturated than Matt Goblin Green. They are different kinds of paint: AMMO by Mig Matt Goblin Green is an ink, glaze or transparent paint and Army Painter Feral Green is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Feral Green is a little darker, more saturated than Matt Goblin Green. They are different kinds of paint.
The same difference applies the other way round: Matt Goblin Green is a little lighter, more muted.
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 Matt Goblin Green on the colour wheel See Feral Green on the colour wheel
All matches: Matt Goblin Green equivalents · Feral Green equivalents