ΔE 8.9, close: similar, with a visible difference side by side. Light Brown is a little lighter, more muted than Dry Rust Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Light Brown is a little lighter, more muted than Dry Rust Brown.
The same difference applies the other way round: Dry Rust Brown is a little darker, more saturated.
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 Dry Rust Brown on the colour wheel See Light Brown on the colour wheel
All matches: Dry Rust Brown equivalents · Light Brown equivalents