ΔE 19.1, loose: different enough that you should pick on purpose. Magenta is much more saturated, cooler than Ruddy Terra.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Magenta is much more saturated, cooler than Ruddy Terra.
The same difference applies the other way round: Ruddy Terra is much 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 Ruddy Terra on the colour wheel See Magenta on the colour wheel
All matches: Ruddy Terra equivalents · Magenta equivalents