ΔE 28.2, loose: different enough that you should pick on purpose. Ink Violet is noticeably darker, much more muted, warmer than Transparent Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Ink Violet is noticeably darker, much more muted, warmer than Transparent Blue.
The same difference applies the other way round: Transparent Blue is noticeably lighter, much more saturated, 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 Transparent Blue on the colour wheel See Ink Violet on the colour wheel
All matches: Transparent Blue equivalents · Ink Violet equivalents