Manticore Ochre vs Flat Flesh

How close are they?

ΔE 15.2, loose: different enough that you should pick on purpose. Flat Flesh is a little darker, more muted, warmer than Manticore Ochre.

Can I use Flat Flesh instead of Manticore Ochre?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Flat Flesh is a little darker, more muted, warmer than Manticore Ochre.

Can I use Manticore Ochre instead of Flat Flesh?

The same difference applies the other way round: Manticore Ochre is a little lighter, more saturated, 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.