ΔE 12.3, fair: the same colour family, but not a straight swap. Death Korps Drab is a little darker, more muted, cooler than RAL 7009 Hellgrau.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Death Korps Drab is a little darker, more muted, cooler than RAL 7009 Hellgrau.
The same difference applies the other way round: RAL 7009 Hellgrau is a little lighter, more saturated, warmer.
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 RAL 7009 Hellgrau on the colour wheel See Death Korps Drab on the colour wheel
All matches: RAL 7009 Hellgrau equivalents · Death Korps Drab equivalents