Resplendent Red vs Quinacridone Violet

How close are they?

ΔE 8.2, close: similar, with a visible difference side by side. Quinacridone Violet is more saturated than Resplendent Red.

Can I use Quinacridone Violet instead of Resplendent Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Quinacridone Violet is more saturated than Resplendent Red.

Can I use Resplendent Red instead of Quinacridone Violet?

The same difference applies the other way round: Resplendent 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.