ΔE 7.5, close: similar, with a visible difference side by side. Interior Grey Green is a little lighter, warmer than Light Feldgrau.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Interior Grey Green is a little lighter, warmer than Light Feldgrau.
The same difference applies the other way round: Light Feldgrau is a little darker, 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 Interior Grey Green on the colour wheel
All matches: Light Feldgrau equivalents · Interior Grey Green equivalents