Satchel Brown vs Darkoath Flesh

How close are they?

ΔE 27.3, loose: different enough that you should pick on purpose. Darkoath Flesh is noticeably lighter, more saturated than Satchel Brown.

Can I use Darkoath Flesh instead of Satchel Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Darkoath Flesh is noticeably lighter, more saturated than Satchel Brown.

Can I use Satchel Brown instead of Darkoath Flesh?

The same difference applies the other way round: Satchel Brown is noticeably darker, more muted.

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.