ΔE 11.9, fair: the same colour family, but not a straight swap. Stormfang is a little darker, more saturated than Grey Goose.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Stormfang is a little darker, more saturated than Grey Goose.
The same difference applies the other way round: Grey Goose is a little 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 Grey Goose on the colour wheel See Stormfang on the colour wheel
All matches: Grey Goose equivalents · Stormfang equivalents