Dark Reaper vs Field Green FS34097

How close are they?

ΔE 9.3, close: similar, with a visible difference side by side. Field Green FS34097 is warmer than Dark Reaper.

Can I use Field Green FS34097 instead of Dark Reaper?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Field Green FS34097 is warmer than Dark Reaper.

Can I use Dark Reaper instead of Field Green FS34097?

The same difference applies the other way round: Dark Reaper is 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.