Glittering Loot vs Gold Brown

How close are they?

ΔE 15.9, loose: different enough that you should pick on purpose. Gold Brown is a little lighter, more muted, warmer than Glittering Loot.

Can I use Gold Brown instead of Glittering Loot?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Gold Brown is a little lighter, more muted, warmer than Glittering Loot.

Can I use Glittering Loot instead of Gold Brown?

The same difference applies the other way round: Glittering Loot is a little darker, 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.