ΔE 5.8, very close: most people won’t see a difference side by side. Jade Green is a little darker, more saturated than Ghoul Green. They are different kinds of paint: Army Painter Ghoul Green is a one-coat contrast-style paint and Reaper Jade Green is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Very close match (ΔE 6). Jade Green is a little darker, more saturated than Ghoul Green. They are different kinds of paint.
The same difference applies the other way round: Ghoul 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 Ghoul Green on the colour wheel See Jade Green on the colour wheel
All matches: Ghoul Green equivalents · Jade Green equivalents