ΔE 19.2, loose: different enough that you should pick on purpose. Deep Magenta is noticeably darker, much more saturated than Glistening Gums.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Deep Magenta is noticeably darker, much more saturated than Glistening Gums.
The same difference applies the other way round: Glistening Gums is noticeably lighter, much more muted.
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 Glistening Gums on the colour wheel See Deep Magenta on the colour wheel
All matches: Glistening Gums equivalents · Deep Magenta equivalents