ΔE 21.1, loose: different enough that you should pick on purpose. Phoenix Feather is much more muted, warmer than Evil Root.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Phoenix Feather is much more muted, warmer than Evil Root.
The same difference applies the other way round: Evil Root is 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 Evil Root on the colour wheel See Phoenix Feather on the colour wheel
All matches: Evil Root equivalents · Phoenix Feather equivalents