ΔE 16.3, loose: different enough that you should pick on purpose. Iceborn is a little darker, much more saturated than White.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Iceborn is a little darker, much more saturated than White.
The same difference applies the other way round: 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 White on the colour wheel See Iceborn on the colour wheel
All matches: White equivalents · Iceborn equivalents