ΔE 8.6, close: similar, with a visible difference side by side. Deep Khaki Drill is more muted, cooler than RLM 79 (1942).
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Deep Khaki Drill is more muted, cooler than RLM 79 (1942).
The same difference applies the other way round: RLM 79 (1942) is more saturated, 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 RLM 79 (1942) on the colour wheel See Deep Khaki Drill on the colour wheel
All matches: RLM 79 (1942) equivalents · Deep Khaki Drill equivalents