ΔE 7.0, close: similar, with a visible difference side by side. Scarlet Red is more muted than Mephiston Red.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Scarlet Red is more muted than Mephiston Red.
The same difference applies the other way round: Mephiston Red is more saturated.
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 Mephiston Red on the colour wheel See Scarlet Red on the colour wheel
All matches: Mephiston Red equivalents · Scarlet Red equivalents