Quinacridone Burnt Orange vs Gorgon Brown

How close are they?

ΔE 15.5, loose: different enough that you should pick on purpose. Gorgon Brown is a little lighter, more muted than Quinacridone Burnt Orange.

Can I use Gorgon Brown instead of Quinacridone Burnt Orange?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Gorgon Brown is a little lighter, more muted than Quinacridone Burnt Orange.

Can I use Quinacridone Burnt Orange instead of Gorgon Brown?

The same difference applies the other way round: Quinacridone Burnt Orange is a little darker, more saturated.

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.