ΔE 9.5, close: similar, with a visible difference side by side. Inferno Red is a little lighter than Cadmium Red Medium Hue.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Inferno Red is a little lighter than Cadmium Red Medium Hue.
The same difference applies the other way round: Cadmium Red Medium Hue 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 Cadmium Red Medium Hue on the colour wheel See Inferno Red on the colour wheel
All matches: Cadmium Red Medium Hue equivalents · Inferno Red equivalents