Nomad Flesh vs Middle Brown

How close are they?

ΔE 20.7, loose: different enough that you should pick on purpose. Middle Brown is noticeably darker, more saturated than Nomad Flesh.

Can I use Middle Brown instead of Nomad Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Middle Brown is noticeably darker, more saturated than Nomad Flesh.

Can I use Nomad Flesh instead of Middle Brown?

The same difference applies the other way round: Nomad Flesh is noticeably lighter, 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.