Air Superiority Blue vs Rus. AF Grey Prot. Coat

How close are they?

ΔE 6.5, close: similar, with a visible difference side by side. Rus. AF Grey Prot. Coat is more muted, warmer than Air Superiority Blue.

Can I use Rus. AF Grey Prot. Coat instead of Air Superiority Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Rus. AF Grey Prot. Coat is more muted, warmer than Air Superiority Blue.

Can I use Air Superiority Blue instead of Rus. AF Grey Prot. Coat?

The same difference applies the other way round: Air Superiority Blue is more saturated, cooler.

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.