ΔE 16.9, loose: different enough that you should pick on purpose. Green Oxide is noticeably darker, more saturated, cooler than Light Feldgrau.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Green Oxide is noticeably darker, more saturated, cooler than Light Feldgrau.
The same difference applies the other way round: Light Feldgrau is noticeably lighter, more muted, 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 Light Feldgrau on the colour wheel See Green Oxide on the colour wheel
All matches: Light Feldgrau equivalents · Green Oxide equivalents