ΔE 19.0, loose: different enough that you should pick on purpose. Unbleached Titanium is a little darker, much more saturated than Valhallan Blizzard.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Unbleached Titanium is a little darker, much more saturated than Valhallan Blizzard.
The same difference applies the other way round: Valhallan Blizzard 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 Valhallan Blizzard on the colour wheel See Unbleached Titanium on the colour wheel
All matches: Valhallan Blizzard equivalents · Unbleached Titanium equivalents