Dusk Red vs Glorious Magenta

How close are they?

ΔE 17.7, loose: different enough that you should pick on purpose. Glorious Magenta is more saturated, cooler than Dusk Red.

Can I use Glorious Magenta instead of Dusk Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Glorious Magenta is more saturated, cooler than Dusk Red.

Can I use Dusk Red instead of Glorious Magenta?

The same difference applies the other way round: Dusk Red is 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.