Skeleton Horde vs Phoenix Egg

How close are they?

ΔE 7.6, close: similar, with a visible difference side by side. Phoenix Egg is more muted, warmer than Skeleton Horde.

Can I use Phoenix Egg instead of Skeleton Horde?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Phoenix Egg is more muted, warmer than Skeleton Horde.

Can I use Skeleton Horde instead of Phoenix Egg?

The same difference applies the other way round: Skeleton Horde 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.