Burnt Orange vs Medium Flesh

How close are they?

ΔE 18.3, loose: different enough that you should pick on purpose. Medium Flesh is a little lighter, much more saturated, cooler than Burnt Orange.

Can I use Medium Flesh instead of Burnt Orange?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Medium Flesh is a little lighter, much more saturated, cooler than Burnt Orange.

Can I use Burnt Orange instead of Medium Flesh?

The same difference applies the other way round: Burnt Orange is a little darker, much more muted, warmer.

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.