ΔE 7.0, close: similar, with a visible difference side by side. UK Light Stone is a little lighter, cooler than Australian Camouflage Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). UK Light Stone is a little lighter, cooler than Australian Camouflage Brown.
The same difference applies the other way round: Australian Camouflage Brown is a little darker, warmer.
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 Australian Camouflage Brown on the colour wheel See UK Light Stone on the colour wheel
All matches: Australian Camouflage Brown equivalents · UK Light Stone equivalents