ΔE 8.1, close: similar, with a visible difference side by side. Charred Brown is a little lighter, more saturated, cooler than Burnt Red.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Charred Brown is a little lighter, more saturated, cooler than Burnt Red.
The same difference applies the other way round: Burnt Red is a little darker, 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 Burnt Red on the colour wheel See Charred Brown on the colour wheel
All matches: Burnt Red equivalents · Charred Brown equivalents