ΔE 14.7, fair: the same colour family, but not a straight swap. Ratskin Flesh is more muted, warmer than Sekigahara.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Ratskin Flesh is more muted, warmer than Sekigahara.
The same difference applies the other way round: Sekigahara is more saturated, 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 Sekigahara on the colour wheel See Ratskin Flesh on the colour wheel
All matches: Sekigahara equivalents · Ratskin Flesh equivalents