ΔE 10.0, close: similar, with a visible difference side by side. IDF Gray 3 Modern is a little lighter, more muted, cooler than Stormvermin Fur.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). IDF Gray 3 Modern is a little lighter, more muted, cooler than Stormvermin Fur.
The same difference applies the other way round: Stormvermin Fur is a little darker, more saturated, 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 Stormvermin Fur on the colour wheel See IDF Gray 3 Modern on the colour wheel
All matches: Stormvermin Fur equivalents · IDF Gray 3 Modern equivalents