ΔE 12.9, fair: the same colour family, but not a straight swap. Seraph Red is a little lighter, more saturated, warmer than Grizzly Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Seraph Red is a little lighter, more saturated, warmer than Grizzly Brown.
The same difference applies the other way round: Grizzly Brown is a little darker, more muted, 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 Grizzly Brown on the colour wheel See Seraph Red on the colour wheel
All matches: Grizzly Brown equivalents · Seraph Red equivalents