ΔE 4.9, very close: most people won’t see a difference side by side. Charred Brown is more saturated, cooler than Russet Shadow.
Yes, for most jobs. Very close match (ΔE 5). Charred Brown is more saturated, cooler than Russet Shadow.
The same difference applies the other way round: Russet Shadow is 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 Russet Shadow on the colour wheel See Charred Brown on the colour wheel
All matches: Russet Shadow equivalents · Charred Brown equivalents