ΔE 15.8, loose: different enough that you should pick on purpose. Iosan Green is noticeably lighter, more saturated than Orruk Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Iosan Green is noticeably lighter, more saturated than Orruk Flesh.
The same difference applies the other way round: Orruk Flesh is noticeably darker, more muted.
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 Orruk Flesh on the colour wheel See Iosan Green on the colour wheel
All matches: Orruk Flesh equivalents · Iosan Green equivalents