ΔE 14.0, fair: the same colour family, but not a straight swap. Blue Glacier is a little lighter, much more saturated, cooler than Space Wolves Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Blue Glacier is a little lighter, much more saturated, cooler than Space Wolves Grey.
The same difference applies the other way round: Space Wolves Grey is a little darker, much more muted, 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 Space Wolves Grey on the colour wheel See Blue Glacier on the colour wheel
All matches: Space Wolves Grey equivalents · Blue Glacier equivalents