ΔE 7.6, close: similar, with a visible difference side by side. Luftwaffe Green is more saturated than RLM 71 Dark Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Luftwaffe Green is more saturated than RLM 71 Dark Green.
The same difference applies the other way round: RLM 71 Dark Green is more muted.
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 71 Dark Green on the colour wheel See Luftwaffe Green on the colour wheel
All matches: RLM 71 Dark Green equivalents · Luftwaffe Green equivalents