ΔE 18.2, loose: different enough that you should pick on purpose. Ghost Green is a little lighter, much more muted, cooler than Pastel Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Ghost Green is a little lighter, much more muted, cooler than Pastel Green.
The same difference applies the other way round: Pastel Green is a little darker, 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 Pastel Green on the colour wheel See Ghost Green on the colour wheel
All matches: Pastel Green equivalents · Ghost Green equivalents