Re: The upside-down Enterprise
They just look upside down with a few tweaks.
Or perhaps you could look at the Connie as just an upside-down version of Matt Jefferies' earlier concept drawings.
"The way that you wander is the way that you choose. / The day that you tarry is the day that you lose. / Sunshine or thunder, a man will always wonder / Where the fair wind blows ..."
-- Lyrics, Jeremiah Johnson's theme.