ΔE 11.6, fair: the same colour family, but not a straight swap. Chaotic Red is a little darker, more saturated than Vermin Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Chaotic Red is a little darker, more saturated than Vermin Brown.
The same difference applies the other way round: Vermin Brown is a little lighter, more muted.
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 Vermin Brown on the colour wheel See Chaotic Red on the colour wheel
All matches: Vermin Brown equivalents · Chaotic Red equivalents