Angron Red Clear vs Hellspawn Red

How close are they?

ΔE 8.0, close: similar, with a visible difference side by side. Hellspawn Red is more muted than Angron Red Clear.

Can I use Hellspawn Red instead of Angron Red Clear?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Hellspawn Red is more muted than Angron Red Clear.

Can I use Angron Red Clear instead of Hellspawn Red?

The same difference applies the other way round: Angron Red Clear is 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.