Night Black vs Thunder Storm

How close are they?

ΔE 7.6, close: similar, with a visible difference side by side. Thunder Storm is a little darker, cooler than Night Black.

Can I use Thunder Storm instead of Night Black?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Thunder Storm is a little darker, cooler than Night Black.

Can I use Night Black instead of Thunder Storm?

The same difference applies the other way round: Night Black 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.