ΔE 25.9, loose: different enough that you should pick on purpose. Orc Green is noticeably darker, much more saturated, cooler than Ogryn Camo.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Orc Green is noticeably darker, much more saturated, cooler than Ogryn Camo.
The same difference applies the other way round: Ogryn Camo is noticeably lighter, much 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 Ogryn Camo on the colour wheel See Orc Green on the colour wheel
All matches: Ogryn Camo equivalents · Orc Green equivalents