The code won't have reference to any SimCity name as that has all be renamed to Micropolis.
Micropolis was the original working title of the game and since EA requires that the GPL open source version
not use the same name as SimCity (to protect their trademark) a little work had to be done to the code.
There's been changes to the original system like a new splash screen, some UI feedback from QA, etc.
The plane crash disaster has been removed as a result of 9/11.
Can we say SimXity? or Mixropolis?
I wonder if this source is for the 16 color dos version,
I always preferred the Atari ST version because it was much nicer to look at.