ΔE 7.9, close: similar, with a visible difference side by side. White Grey is a little lighter, more saturated than Light Grey FS-35630.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). White Grey is a little lighter, more saturated than Light Grey FS-35630.
The same difference applies the other way round: Light Grey FS-35630 is a little darker, more muted.
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 Light Grey FS-35630 on the colour wheel See White Grey on the colour wheel
All matches: Light Grey FS-35630 equivalents · White Grey equivalents