ΔE 12.1, fair: the same colour family, but not a straight swap. Orange Oxide is a little darker, more saturated, cooler than Catachan Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Orange Oxide is a little darker, more saturated, cooler than Catachan Flesh.
The same difference applies the other way round: Catachan Flesh is a little 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 Catachan Flesh on the colour wheel See Orange Oxide on the colour wheel
All matches: Catachan Flesh equivalents · Orange Oxide equivalents