ΔE 42.5, loose: different enough that you should pick on purpose. Ink Yellow is noticeably lighter, much more saturated, warmer than Penetrating Red INK.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 43). Ink Yellow is noticeably lighter, much more saturated, warmer than Penetrating Red INK.
The same difference applies the other way round: Penetrating Red INK is noticeably darker, much more muted, 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 Penetrating Red INK on the colour wheel See Ink Yellow on the colour wheel
All matches: Penetrating Red INK equivalents · Ink Yellow equivalents