^Apples to oranges. The floating office is just that, an office. Its purpose was to provide the refit engineering team with a meeting site separate from the Enterprise itself.
That's interesting. I didn't even think that this could be just a temporary structure built solely for the refit. I thought it was just another starbase.
Then again, there's the image on the cover of the Typhon Pact novel Raise the Dawn
which many people thought was Deep Space Nine mark II, but it wasn't the new station itself - just the temporary habitat intended for use by the construction workers who were building it.
In this link
, the new DS9 is the top image, the construction habitat is the bottom one.
... so I guess it's not entirely without precedent.