Dusty Skull vs Rodent Grey

How close are they?

ΔE 7.6, close: similar, with a visible difference side by side. Rodent Grey is a little darker, cooler than Dusty Skull.

Can I use Rodent Grey instead of Dusty Skull?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Rodent Grey is a little darker, cooler than Dusty Skull.

Can I use Dusty Skull instead of Rodent Grey?

The same difference applies the other way round: Dusty Skull is a little lighter, 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.