ΔE 12.7, fair: the same colour family, but not a straight swap. Bright Ivory is a little darker, much more saturated than Matt White.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Bright Ivory is a little darker, much more saturated than Matt White.
The same difference applies the other way round: Matt White 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 Matt White on the colour wheel See Bright Ivory on the colour wheel
All matches: Matt White equivalents · Bright Ivory equivalents