Bronze Green vs Eshin Grey

How close are they?

ΔE 16.7, loose: different enough that you should pick on purpose. Eshin Grey is noticeably lighter, much more muted than Bronze Green.

Can I use Eshin Grey instead of Bronze Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Eshin Grey is noticeably lighter, much more muted than Bronze Green.

Can I use Bronze Green instead of Eshin Grey?

The same difference applies the other way round: Bronze Green is noticeably darker, much more saturated.

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.