ΔE 42.2, loose: different enough that you should pick on purpose. Ink Red is noticeably darker, much more saturated, cooler than Raw Sienna.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 42). Ink Red is noticeably darker, much more saturated, cooler than Raw Sienna.
The same difference applies the other way round: Raw Sienna is noticeably lighter, 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 Raw Sienna on the colour wheel See Ink Red on the colour wheel
All matches: Raw Sienna equivalents · Ink Red equivalents