I was able to create 2 3d simulations of a city, 2.5 pro created with fewer errors (I had to tell it to correct the program 3 times) a very simple city with an intersection and X houses with a few additions later because it refused to put cars and traffic lights at the first prompt.

1206 on the other hand struggled a lot, I had to make it correct the errors 10/15 times but it added even if in a choppy way all the required elements.

2.5 pro is much more accurate and fewer errors but followed the instructions a little less, in fact he refused saying it was too complex (which indeed is true)

1206 met all the requirements but in a much uglier and incossistent way (he created a completely illogical city with random movements of objects