ΔE 13.5, fair: the same colour family, but not a straight swap. Astorath Red is a little darker, more saturated, cooler than Vermillion.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Astorath Red is a little darker, more saturated, cooler than Vermillion.
The same difference applies the other way round: Vermillion 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 Vermillion on the colour wheel See Astorath Red on the colour wheel
All matches: Vermillion equivalents · Astorath Red equivalents