IJN Mitsubishi Green vs Loren Forest

How close are they?

ΔE 9.7, close: similar, with a visible difference side by side. Loren Forest is more muted, warmer than IJN Mitsubishi Green.

Can I use Loren Forest instead of IJN Mitsubishi Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Loren Forest is more muted, warmer than IJN Mitsubishi Green.

Can I use IJN Mitsubishi Green instead of Loren Forest?

The same difference applies the other way round: IJN Mitsubishi Green is 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.