ΔE 8.3, close: similar, with a visible difference side by side. Brown Sand is a little lighter, more muted than S.C.C. No.2 Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Brown Sand is a little lighter, more muted than S.C.C. No.2 Brown.
The same difference applies the other way round: S.C.C. No.2 Brown is a little darker, 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 S.C.C. No.2 Brown on the colour wheel See Brown Sand on the colour wheel
All matches: S.C.C. No.2 Brown equivalents · Brown Sand equivalents