ΔE 24.4, loose: different enough that you should pick on purpose. Raw Sienna is a little lighter, more saturated, warmer than Nomad Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Raw Sienna is a little lighter, more saturated, warmer than Nomad Flesh.
The same difference applies the other way round: Nomad Flesh is a little darker, 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.
See Nomad Flesh on the colour wheel See Raw Sienna on the colour wheel
All matches: Nomad Flesh equivalents · Raw Sienna equivalents