Howdy folks funny enough I was just searching this same topic since this is coming up in our upcoming Starfinder game.
Bump to see what other responses we can get.
I agree so far with River of Sticks and John- The race special ability specifically calls out that the Astrazoan can select a specific creature or a more general version of said race/type. The fact it provides that distinction of choice (although not directly stating it) indicates you can pick a very specific looking "George Clooney" type look and can memic a specific person.
However: The point being made about overlap with Operatives Master of Disguise- that operative exploit allows it to be so good that an extra Will check is made before even trying to penetrate the disguise. So there is some value there.
I see this the difference between looking and acting the part. Any Astrazoan can look like a specific human, but this Master of Disguise can play the part so well and convincing its hard to detect.
To add to the original question mechanically: Does the "Master of Disquise" exploit (net +10 to Disguise check) and the Astrazoan +10 to Disguise: Do they stack?
