ΔE 8.1, close: similar, with a visible difference side by side. IDF/IAF Green is a little darker, warmer than Light Feldgrau.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). IDF/IAF Green is a little darker, warmer than Light Feldgrau.
The same difference applies the other way round: Light Feldgrau is a little lighter, cooler.
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 Light Feldgrau on the colour wheel See IDF/IAF Green on the colour wheel
All matches: Light Feldgrau equivalents · IDF/IAF Green equivalents