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