Sons of Horus Green vs Dark Green 2

How close are they?

ΔE 17.1, loose: different enough that you should pick on purpose. Dark Green 2 is noticeably lighter, more muted, warmer than Sons of Horus Green.

Can I use Dark Green 2 instead of Sons of Horus Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Dark Green 2 is noticeably lighter, more muted, warmer than Sons of Horus Green.

Can I use Sons of Horus Green instead of Dark Green 2?

The same difference applies the other way round: Sons of Horus Green is noticeably darker, more saturated, 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.