ΔE 8.3, close: similar, with a visible difference side by side. Steel Legion Drab is a little darker, warmer than RLM 80.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Steel Legion Drab is a little darker, warmer than RLM 80.
The same difference applies the other way round: RLM 80 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 RLM 80 on the colour wheel See Steel Legion Drab on the colour wheel
All matches: RLM 80 equivalents · Steel Legion Drab equivalents