ΔE 10.0, fair: the same colour family, but not a straight swap. Waystone Green is a little darker, warmer than Cold Green. They are different kinds of paint: AK Interactive Cold Green is an opaque base/layer paint and Citadel Waystone Green is a technical paint or medium, 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 10). Waystone Green is a little darker, warmer than Cold Green. They are different kinds of paint.
The same difference applies the other way round: Cold Green is a little lighter, 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 Cold Green on the colour wheel See Waystone Green on the colour wheel
All matches: Cold Green equivalents · Waystone Green equivalents