Orange Tone vs Blush Red

How close are they?

ΔE 30.0, loose: different enough that you should pick on purpose. Blush Red is noticeably lighter, more muted, cooler than Orange Tone.

Can I use Blush Red instead of Orange Tone?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 30). Blush Red is noticeably lighter, more muted, cooler than Orange Tone.

Can I use Orange Tone instead of Blush Red?

The same difference applies the other way round: Orange Tone is noticeably darker, 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.