ΔE 12.0, fair: the same colour family, but not a straight swap. White Grey is a little darker, more muted, cooler than Titan Buff.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). White Grey is a little darker, more muted, cooler than Titan Buff.
The same difference applies the other way round: Titan Buff is a little lighter, more saturated, 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 Titan Buff on the colour wheel See White Grey on the colour wheel
All matches: Titan Buff equivalents · White Grey equivalents