ΔE 9.6, close: similar, with a visible difference side by side. Dark Vermilion is a little lighter, more saturated than Resplendent Red.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Dark Vermilion is a little lighter, more saturated than Resplendent Red.
The same difference applies the other way round: Resplendent Red is a little darker, 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.
See Resplendent Red on the colour wheel See Dark Vermilion on the colour wheel
All matches: Resplendent Red equivalents · Dark Vermilion equivalents