ΔE 8.8, close: similar, with a visible difference side by side. Spaceship Exterior is a little lighter, more muted than Duck Egg Blue FS 35622.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Spaceship Exterior is a little lighter, more muted than Duck Egg Blue FS 35622.
The same difference applies the other way round: Duck Egg Blue FS 35622 is a little darker, 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 Duck Egg Blue FS 35622 on the colour wheel See Spaceship Exterior on the colour wheel
All matches: Duck Egg Blue FS 35622 equivalents · Spaceship Exterior equivalents