ΔE 6.3, close: similar, with a visible difference side by side. Chocolate Brown is a little lighter than Dark Brown Ochre.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Chocolate Brown is a little lighter than Dark Brown Ochre.
The same difference applies the other way round: Dark Brown Ochre is a little darker.
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 Dark Brown Ochre on the colour wheel See Chocolate Brown on the colour wheel
All matches: Dark Brown Ochre equivalents · Chocolate Brown equivalents