Well, it did lack the monorails
The monorails can be seen in TDK and in RISES, so that's not true at all. It's safe to assume the monorails were scaled back by the city after the events of Batman Begins. But they can be seen in both sequels to Batman Begins.
Fudgie said:
Apart from the Narrows it was the same Gotham.
Agreed. The Narrows don't re-appear in TDK and RISES because it's safe to assume they have been whiped clean and boarded up.
The Narrows was just a set, and ultimately the only difference from the other films ... where as the rest of the film is filmed on location in Chicago.
Lower Whacker Street is used in BEGINS and TDK for chase scenes. It keeps a visual flow through.
Also, the removal of the Narrows after the end of BEGINS makes sense why Wayne Tower changes from BEGINS to TDK and RISES.
After the train crashes into it and blows up, it's reasonable to think Wayne Enterprises packs up and moves there stuff to a new building.
While TDK and RISES has Gotham looking cleaner, more sterile, and not as many pitch black night time shots ...
It's to reflect the change and dynamic of the story. In BEGINS Wayne establishes the theatricality of Batman in the pitch black of night.
In TDK as his legend and mystique grow he's brought out at dusk and slight hints of dawn.
In RISES he's brought out fully into the day to bring the dawn to Gotham the way Dent promised in TDK.
The city looks cleaner starting in TDK because it shows the impact the Batman has had on crime in Gotham. It all makes sense stylistically and thematically.
It's not a totaly different continuity feel the way B89's dirty, opressive and grim Gotham changed to RETURN's Goth circle jerk Gotham, and then changed to the Fruit Loops Gotham City of Shumacher's vision.
There is plenty of visual connection and continuity between films.