ΔE 11.9, fair: the same colour family, but not a straight swap. Clear Orange is more muted, warmer than Mars Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Clear Orange is more muted, warmer than Mars Red.
The same difference applies the other way round: Mars Red is 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 Mars Red on the colour wheel See Clear Orange on the colour wheel
All matches: Mars Red equivalents · Clear Orange equivalents