Clear Orange vs Ink Red

How close are they?

ΔE 46.6, loose: different enough that you should pick on purpose. Ink Red is noticeably darker, more muted, cooler than Clear Orange.

Can I use Ink Red instead of Clear Orange?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 47). Ink Red is noticeably darker, more muted, cooler than Clear Orange.

Can I use Clear Orange instead of Ink Red?

The same difference applies the other way round: Clear Orange is noticeably lighter, more saturated, 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.