ΔE 17.3, loose: different enough that you should pick on purpose. Magenta is more saturated, cooler than Grape Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Magenta is more saturated, cooler than Grape Red.
The same difference applies the other way round: Grape 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.
See Grape Red on the colour wheel See Magenta on the colour wheel
All matches: Grape Red equivalents · Magenta equivalents