ΔE 13.0, fair: the same colour family, but not a straight swap. Aggaros Dunes is a little lighter, more saturated than Wasteland Clay. They are different kinds of paint: Army Painter Wasteland Clay is an opaque base/layer paint and Citadel Aggaros Dunes is a one-coat contrast-style paint, so they won’t behave the same on the model even where the colour is close.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Aggaros Dunes is a little lighter, more saturated than Wasteland Clay. They are different kinds of paint.
The same difference applies the other way round: Wasteland Clay is a little darker, 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 Wasteland Clay on the colour wheel See Aggaros Dunes on the colour wheel
All matches: Wasteland Clay equivalents · Aggaros Dunes equivalents