ΔE 33.7, loose: different enough that you should pick on purpose. Titan Violet Pale is noticeably lighter, much more muted than Fulgrim Pink.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 34). Titan Violet Pale is noticeably lighter, much more muted than Fulgrim Pink.
The same difference applies the other way round: Fulgrim Pink is noticeably darker, much more saturated.
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 Fulgrim Pink on the colour wheel See Titan Violet Pale on the colour wheel
All matches: Fulgrim Pink equivalents · Titan Violet Pale equivalents