ΔE 7.2, close: similar, with a visible difference side by side. Ammo Pouch Brown is warmer than ANA 613 Olive Drab.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Ammo Pouch Brown is warmer than ANA 613 Olive Drab.
The same difference applies the other way round: ANA 613 Olive Drab is 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 ANA 613 Olive Drab on the colour wheel See Ammo Pouch Brown on the colour wheel
All matches: ANA 613 Olive Drab equivalents · Ammo Pouch Brown equivalents