ΔE 9.6, close: similar, with a visible difference side by side. Swamp Brown is a little darker than Aged Hide. They are different kinds of paint: Army Painter Aged Hide is a one-coat contrast-style paint and Green Stuff World Swamp Brown is an ink, glaze or transparent 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 10). Swamp Brown is a little darker than Aged Hide. They are different kinds of paint.
The same difference applies the other way round: Aged Hide is a little lighter.
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 Aged Hide on the colour wheel See Swamp Brown on the colour wheel
All matches: Aged Hide equivalents · Swamp Brown equivalents