Interior Yellow Green vs Golden Griffon

How close are they?

ΔE 17.1, loose: different enough that you should pick on purpose. Golden Griffon is noticeably darker, more saturated than Interior Yellow Green.

Can I use Golden Griffon instead of Interior Yellow Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Golden Griffon is noticeably darker, more saturated than Interior Yellow Green.

Can I use Interior Yellow Green instead of Golden Griffon?

The same difference applies the other way round: Interior Yellow 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.