ΔE 21.0, loose: different enough that you should pick on purpose. Alaitoc Blue is a little darker, cooler than Lavender.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Alaitoc Blue is a little darker, cooler than Lavender.
The same difference applies the other way round: Lavender is a little lighter, 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 Lavender on the colour wheel See Alaitoc Blue on the colour wheel
All matches: Lavender equivalents · Alaitoc Blue equivalents