Talisman Green vs Angel Green

How close are they?

ΔE 26.2, loose: different enough that you should pick on purpose. Angel Green is noticeably darker, cooler than Talisman Green.

Can I use Angel Green instead of Talisman Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Angel Green is noticeably darker, cooler than Talisman Green.

Can I use Talisman Green instead of Angel Green?

The same difference applies the other way round: Talisman Green is noticeably lighter, 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.