ΔE 13.8, fair: the same colour family, but not a straight swap. Smoke Blue is a little darker, much more saturated than White Scar.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Smoke Blue is a little darker, much more saturated than White Scar.
The same difference applies the other way round: White Scar is a little lighter, much 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 White Scar on the colour wheel See Smoke Blue on the colour wheel
All matches: White Scar equivalents · Smoke Blue equivalents