ΔE 14.3, fair: the same colour family, but not a straight swap. Wolven Grey is noticeably darker, more saturated than Spaceship Exterior.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Wolven Grey is noticeably darker, more saturated than Spaceship Exterior.
The same difference applies the other way round: Spaceship Exterior is noticeably lighter, 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 Spaceship Exterior on the colour wheel See Wolven Grey on the colour wheel
All matches: Spaceship Exterior equivalents · Wolven Grey equivalents