ΔE 11.2, fair: the same colour family, but not a straight swap. Insignia White is a little darker, cooler than Fang White.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Insignia White is a little darker, cooler than Fang White.
The same difference applies the other way round: Fang White is a little lighter, 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 Fang White on the colour wheel See Insignia White on the colour wheel
All matches: Fang White equivalents · Insignia White equivalents