ΔE 13.5, fair: the same colour family, but not a straight swap. Parasite Brown is a little darker, more muted, warmer than Faded Orange.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Parasite Brown is a little darker, more muted, warmer than Faded Orange.
The same difference applies the other way round: Faded Orange is a little lighter, 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 Faded Orange on the colour wheel See Parasite Brown on the colour wheel
All matches: Faded Orange equivalents · Parasite Brown equivalents