ΔE 19.0, loose: different enough that you should pick on purpose. Crimson Magenta is much more saturated, warmer than Syringa.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Crimson Magenta is much more saturated, warmer than Syringa.
The same difference applies the other way round: Syringa is 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 Syringa on the colour wheel See Crimson Magenta on the colour wheel
All matches: Syringa equivalents · Crimson Magenta equivalents