ΔE 13.6, fair: the same colour family, but not a straight swap. Northern Flesh is a little lighter, 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). Northern Flesh is a little lighter, more saturated than Spaceship Exterior.
The same difference applies the other way round: Spaceship Exterior 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 Spaceship Exterior on the colour wheel See Northern Flesh on the colour wheel
All matches: Spaceship Exterior equivalents · Northern Flesh equivalents