ΔE 9.2, close: similar, with a visible difference side by side. Steel Legion Drab is more saturated than Fade to Black.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Steel Legion Drab is more saturated than Fade to Black.
The same difference applies the other way round: Fade to Black is 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 Fade to Black on the colour wheel See Steel Legion Drab on the colour wheel
All matches: Fade to Black equivalents · Steel Legion Drab equivalents