ΔE 7.3, close: similar, with a visible difference side by side. Red RLM23 is a little lighter than Quinacridone Crimson.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Red RLM23 is a little lighter than Quinacridone Crimson.
The same difference applies the other way round: Quinacridone Crimson is a little darker.
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.
See Quinacridone Crimson on the colour wheel See Red RLM23 on the colour wheel
All matches: Quinacridone Crimson equivalents · Red RLM23 equivalents