Astorath Red vs Bold Pyrrole Red

How close are they?

ΔE 9.8, close: similar, with a visible difference side by side. Bold Pyrrole Red is more saturated than Astorath Red.

Can I use Bold Pyrrole Red instead of Astorath Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Bold Pyrrole Red is more saturated than Astorath Red.

Can I use Astorath Red instead of Bold Pyrrole Red?

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