ΔE 12.4, fair: the same colour family, but not a straight swap. Character Yellow is a little lighter, warmer than Mythical Orange.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Character Yellow is a little lighter, warmer than Mythical Orange.
The same difference applies the other way round: Mythical Orange is a little darker, 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 Mythical Orange on the colour wheel See Character Yellow on the colour wheel
All matches: Mythical Orange equivalents · Character Yellow equivalents