ΔE 42.6, loose: different enough that you should pick on purpose. Primer Taupe is noticeably darker, more saturated than Valhallan Blizzard.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 43). Primer Taupe is noticeably darker, more saturated than Valhallan Blizzard.
The same difference applies the other way round: Valhallan Blizzard is noticeably lighter, 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 Primer Taupe on the colour wheel
All matches: Valhallan Blizzard equivalents · Primer Taupe equivalents