ΔE 10.3, fair: the same colour family, but not a straight swap. Light DAK Sand is a little lighter, more muted than Matt Orange. They are different kinds of paint: AMMO by Mig Matt Orange is an ink, glaze or transparent paint and Army Painter Light DAK Sand is an opaque base/layer 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 10). Light DAK Sand is a little lighter, more muted than Matt Orange. They are different kinds of paint.
The same difference applies the other way round: Matt Orange is a little darker, more saturated.
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 Matt Orange on the colour wheel See Light DAK Sand on the colour wheel
All matches: Matt Orange equivalents · Light DAK Sand equivalents