ΔE 7.8, close: similar, with a visible difference side by side. Aged White is a little lighter, more saturated, warmer than Terminatus Stone.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Aged White is a little lighter, more saturated, warmer than Terminatus Stone.
The same difference applies the other way round: Terminatus Stone is a little darker, more muted, cooler.
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 Terminatus Stone on the colour wheel See Aged White on the colour wheel
All matches: Terminatus Stone equivalents · Aged White equivalents