It is more along the lines of building a hundred frigates or one DS. Apparently Economies of scale really love Death Stars.
-a member, arguing that the construction of the Death Star is an industrial feat roughly equivalent to building a hundred frigates. His source:
ISB page 11
The Death Star Project is an example of a priority sector into which the Empire poured resources enough to have formed perhaps a score of Sector Groups
Since Starfleet is not incompetent that is not a problem.
[Context there; SWST is me, attempting to question how imperial ships could use fusion reactors, when they explode whenever hit, a characteristic typically not attributed to a nuclear powerplant; Picard, responding by saying that atomizing the Death Star isn't impressive, because it's moon sized, and the Enterprise could be moon sized, depending on how you view it...
To be fair, English isn't his first language.]