Hoard Bronze vs Bright Gold

How close are they?

ΔE 22.3, loose: different enough that you should pick on purpose. Bright Gold is noticeably lighter, much more saturated than Hoard Bronze.

Can I use Bright Gold instead of Hoard Bronze?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Bright Gold is noticeably lighter, much more saturated than Hoard Bronze.

Can I use Hoard Bronze instead of Bright Gold?

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