ΔE 7.2, close: similar, with a visible difference side by side. US Earth Brown is a little lighter than Bleached Strap Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). US Earth Brown is a little lighter than Bleached Strap Grey.
The same difference applies the other way round: Bleached Strap Grey 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 Bleached Strap Grey on the colour wheel See US Earth Brown on the colour wheel
All matches: Bleached Strap Grey equivalents · US Earth Brown equivalents