ΔE 46.5, loose: different enough that you should pick on purpose. Ink Magenta is noticeably darker, cooler than Inktense Ochre.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 47). Ink Magenta is noticeably darker, cooler than Inktense Ochre.
The same difference applies the other way round: Inktense Ochre is noticeably lighter, 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 Inktense Ochre on the colour wheel See Ink Magenta on the colour wheel
All matches: Inktense Ochre equivalents · Ink Magenta equivalents