ΔE 14.5, fair: the same colour family, but not a straight swap. Angel Green is a little darker, more saturated, warmer than Phthalo Green (Yellow Shade).
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Angel Green is a little darker, more saturated, warmer than Phthalo Green (Yellow Shade).
The same difference applies the other way round: Phthalo Green (Yellow Shade) is a little lighter, 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 Phthalo Green (Yellow Shade) on the colour wheel See Angel Green on the colour wheel
All matches: Phthalo Green (Yellow Shade) equivalents · Angel Green equivalents