ΔE 6.4, close: similar, with a visible difference side by side. Light Brown is a little lighter than Orange Oxide.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Light Brown is a little lighter than Orange Oxide.
The same difference applies the other way round: Orange Oxide 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 Orange Oxide on the colour wheel See Light Brown on the colour wheel
All matches: Orange Oxide equivalents · Light Brown equivalents