Beret Maroon vs Feral Brown

How close are they?

ΔE 20.5, loose: different enough that you should pick on purpose. Feral Brown is noticeably darker, much more muted than Beret Maroon.

Can I use Feral Brown instead of Beret Maroon?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Feral Brown is noticeably darker, much more muted than Beret Maroon.

Can I use Beret Maroon instead of Feral Brown?

The same difference applies the other way round: Beret Maroon is noticeably lighter, much 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.