ΔE 6.5, close: similar, with a visible difference side by side. Green Grey is a little lighter than RLM 81 Brown Violet.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Green Grey is a little lighter than RLM 81 Brown Violet.
The same difference applies the other way round: RLM 81 Brown Violet is a little darker.
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 81 Brown Violet on the colour wheel See Green Grey on the colour wheel
All matches: RLM 81 Brown Violet equivalents · Green Grey equivalents