ΔE 23.4, loose: different enough that you should pick on purpose. Lemon Yellow is a little lighter, more saturated, warmer than Pure Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Lemon Yellow is a little lighter, more saturated, warmer than Pure Green.
The same difference applies the other way round: Pure Green is a little darker, 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 Pure Green on the colour wheel See Lemon Yellow on the colour wheel
All matches: Pure Green equivalents · Lemon Yellow equivalents