Foundry Red vs Talos Bronze

How close are they?

ΔE 26.8, loose: different enough that you should pick on purpose. Talos Bronze is much more muted, warmer than Foundry Red.

Can I use Talos Bronze instead of Foundry Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Talos Bronze is much more muted, warmer than Foundry Red.

Can I use Foundry Red instead of Talos Bronze?

The same difference applies the other way round: Foundry Red is much 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.