ΔE 7.5, close: similar, with a visible difference side by side. Leaf Green is a little darker, more saturated than Kroak Green. They are different kinds of paint: Citadel Kroak Green is a wash/shade and Reaper Leaf 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 8). Leaf Green is a little darker, more saturated than Kroak Green. They are different kinds of paint.
The same difference applies the other way round: Kroak 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 Kroak Green on the colour wheel See Leaf Green on the colour wheel
All matches: Kroak Green equivalents · Leaf Green equivalents