ΔE 8.8, close: similar, with a visible difference side by side. Arctic Blue (Metal.) is a little lighter than Dead Star.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Arctic Blue (Metal.) is a little lighter than Dead Star.
The same difference applies the other way round: Dead Star is a little darker.
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 Dead Star on the colour wheel See Arctic Blue (Metal.) on the colour wheel
All matches: Dead Star equivalents · Arctic Blue (Metal.) equivalents