Topaz Skin vs Quinacridone Burnt Orange

How close are they?

ΔE 20.2, loose: different enough that you should pick on purpose. Quinacridone Burnt Orange is noticeably darker, more saturated than Topaz Skin.

Can I use Quinacridone Burnt Orange instead of Topaz Skin?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Quinacridone Burnt Orange is noticeably darker, more saturated than Topaz Skin.

Can I use Topaz Skin instead of Quinacridone Burnt Orange?

The same difference applies the other way round: Topaz Skin 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.