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