Red Primer vs Tuskgor Fur

How close are they?

ΔE 8.3, close: similar, with a visible difference side by side. Tuskgor Fur is a little darker, more muted than Red Primer.

Can I use Tuskgor Fur instead of Red Primer?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Tuskgor Fur is a little darker, more muted than Red Primer.

Can I use Red Primer instead of Tuskgor Fur?

The same difference applies the other way round: Red Primer is a little lighter, more saturated.

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.