ΔE 26.8, loose: different enough that you should pick on purpose. Angel Green is a little darker, much more saturated, cooler than Rotten Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Angel Green is a little darker, much more saturated, cooler than Rotten Green.
The same difference applies the other way round: Rotten Green is a little lighter, much 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 Rotten Green on the colour wheel See Angel Green on the colour wheel
All matches: Rotten Green equivalents · Angel Green equivalents