Knight-Questor Flesh vs Gorgon Brown

How close are they?

ΔE 6.0, close: similar, with a visible difference side by side. Gorgon Brown is a little lighter, more muted than Knight-Questor Flesh.

Can I use Gorgon Brown instead of Knight-Questor Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Gorgon Brown is a little lighter, more muted than Knight-Questor Flesh.

Can I use Knight-Questor Flesh instead of Gorgon Brown?

The same difference applies the other way round: Knight-Questor Flesh 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.