ΔE 20.4, loose: different enough that you should pick on purpose. Red is more muted, warmer than Magnus the Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Red is more muted, warmer than Magnus the Red.
The same difference applies the other way round: Magnus the Red is more saturated, cooler.
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 Magnus the Red on the colour wheel See Red on the colour wheel
All matches: Magnus the Red equivalents · Red equivalents