Cadian Fleshtone vs German Orange

How close are they?

ΔE 19.6, loose: different enough that you should pick on purpose. German Orange is a little darker, more saturated, cooler than Cadian Fleshtone.

Can I use German Orange instead of Cadian Fleshtone?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). German Orange is a little darker, more saturated, cooler than Cadian Fleshtone.

Can I use Cadian Fleshtone instead of German Orange?

The same difference applies the other way round: Cadian Fleshtone is a little lighter, 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.