ΔE 7.1, close: similar, with a visible difference side by side. Mid Feldgrau is a little lighter, more saturated than Graugrün RLM 74.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Mid Feldgrau is a little lighter, more saturated than Graugrün RLM 74.
The same difference applies the other way round: Graugrün RLM 74 is a little darker, 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 Graugrün RLM 74 on the colour wheel See Mid Feldgrau on the colour wheel
All matches: Graugrün RLM 74 equivalents · Mid Feldgrau equivalents