Dark Flesh vs Scrofulous Brown

How close are they?

ΔE 15.7, loose: different enough that you should pick on purpose. Scrofulous Brown is noticeably darker, more saturated, warmer than Dark Flesh.

Can I use Scrofulous Brown instead of Dark Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Scrofulous Brown is noticeably darker, more saturated, warmer than Dark Flesh.

Can I use Dark Flesh instead of Scrofulous Brown?

The same difference applies the other way round: Dark Flesh is noticeably lighter, more muted, 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.