ΔE 7.8, close: similar, with a visible difference side by side. Squig Orange is a little lighter than Scarlet Red.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Squig Orange is a little lighter than Scarlet Red.
The same difference applies the other way round: Scarlet Red 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 Scarlet Red on the colour wheel See Squig Orange on the colour wheel
All matches: Scarlet Red equivalents · Squig Orange equivalents