ΔE 12.6, fair: the same colour family, but not a straight swap. Sap Green Hue is a little darker, more muted, warmer than Death World Forest. They are different kinds of paint: Citadel Death World Forest is an opaque base/layer paint and Golden Sap Green Hue is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Sap Green Hue is a little darker, more muted, warmer than Death World Forest. They are different kinds of paint.
The same difference applies the other way round: Death World Forest is a little lighter, more saturated, 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 Death World Forest on the colour wheel See Sap Green Hue on the colour wheel
All matches: Death World Forest equivalents · Sap Green Hue equivalents