ΔE 8.6, close: similar, with a visible difference side by side. Violet Volt is a little darker, cooler than Orchid.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Violet Volt is a little darker, cooler than Orchid.
The same difference applies the other way round: Orchid is a little lighter, warmer.
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 Orchid on the colour wheel See Violet Volt on the colour wheel
All matches: Orchid equivalents · Violet Volt equivalents