ΔE 7.8, close: similar, with a visible difference side by side. Bleached Strap Grey is a little darker, more muted than French Greyish Blue.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Bleached Strap Grey is a little darker, more muted than French Greyish Blue.
The same difference applies the other way round: French Greyish Blue is a little lighter, 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 French Greyish Blue on the colour wheel See Bleached Strap Grey on the colour wheel
All matches: French Greyish Blue equivalents · Bleached Strap Grey equivalents