ΔE 20.4, loose: different enough that you should pick on purpose. Angel Green is noticeably darker, more saturated than Spring Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Angel Green is noticeably darker, more saturated than Spring Green.
The same difference applies the other way round: Spring Green is noticeably lighter, more muted.
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 Spring Green on the colour wheel See Angel Green on the colour wheel
All matches: Spring Green equivalents · Angel Green equivalents