ΔE 14.1, fair: the same colour family, but not a straight swap. Luftwaffe Green is a little lighter, more muted, warmer than Prussian Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Luftwaffe Green is a little lighter, more muted, warmer than Prussian Green.
The same difference applies the other way round: Prussian Green is a little darker, more saturated, 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 Prussian Green on the colour wheel See Luftwaffe Green on the colour wheel
All matches: Prussian Green equivalents · Luftwaffe Green equivalents