ΔE 26.1, loose: different enough that you should pick on purpose. Lendanis Grey is a little darker, much more muted, cooler than Dechala Lilac.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Lendanis Grey is a little darker, much more muted, cooler than Dechala Lilac.
The same difference applies the other way round: Dechala Lilac is a little lighter, much more saturated, 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 Dechala Lilac on the colour wheel See Lendanis Grey on the colour wheel
All matches: Dechala Lilac equivalents · Lendanis Grey equivalents