Death Metal vs Warplock Bronze

How close are they?

ΔE 15.2, loose: different enough that you should pick on purpose. Warplock Bronze is a little lighter, much more saturated than Death Metal.

Can I use Warplock Bronze instead of Death Metal?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Warplock Bronze is a little lighter, much more saturated than Death Metal.

Can I use Death Metal instead of Warplock Bronze?

The same difference applies the other way round: Death Metal is a little 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.