ΔE 19.9, loose: different enough that you should pick on purpose. Yellow Green is a little darker, more saturated, cooler than Pistachio.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Yellow Green is a little darker, more saturated, cooler than Pistachio.
The same difference applies the other way round: Pistachio is a little lighter, more muted, 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 Pistachio on the colour wheel See Yellow Green on the colour wheel
All matches: Pistachio equivalents · Yellow Green equivalents