Glittering Loot vs Runic Gold

How close are they?

ΔE 9.4, close: similar, with a visible difference side by side. Runic Gold is a little darker, cooler than Glittering Loot.

Can I use Runic Gold instead of Glittering Loot?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Runic Gold is a little darker, cooler than Glittering Loot.

Can I use Glittering Loot instead of Runic Gold?

The same difference applies the other way round: Glittering Loot 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.