ΔE 8.0, close: similar, with a visible difference side by side. Mid Feldgrau is a little darker, warmer than Green Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Mid Feldgrau is a little darker, warmer than Green Grey.
The same difference applies the other way round: Green Grey 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 Green Grey on the colour wheel See Mid Feldgrau on the colour wheel
All matches: Green Grey equivalents · Mid Feldgrau equivalents