ΔE 38.3, loose: different enough that you should pick on purpose. Primer Dark Camo Green is noticeably darker, much more muted, warmer than Nihilakh Oxide.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 38). Primer Dark Camo Green is noticeably darker, much more muted, warmer than Nihilakh Oxide.
The same difference applies the other way round: Nihilakh Oxide is noticeably lighter, much 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 Nihilakh Oxide on the colour wheel See Primer Dark Camo Green on the colour wheel
All matches: Nihilakh Oxide equivalents · Primer Dark Camo Green equivalents