Baal Red vs Frenzy Orange

How close are they?

ΔE 31.3, loose: different enough that you should pick on purpose. Frenzy Orange is noticeably lighter, more saturated, warmer than Baal Red.

Can I use Frenzy Orange instead of Baal Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 31). Frenzy Orange is noticeably lighter, more saturated, warmer than Baal Red.

Can I use Baal Red instead of Frenzy Orange?

The same difference applies the other way round: Baal Red is noticeably darker, more muted, 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.