Quote Originally Posted by SSNeoperestroika
Am still inclined to be sceptical about this, because originally RTW was shown to
have a more advanced version.

You can see in these:

Example 1

Example 2

Example 3
As TB666 said...

The shots are from a promotional video, I believe an online version for when Rome had no real ingame movies. They quickly came and presented the game in the proper fashion with hardly a change. Those shots are not intended to give an impression of how the game would look.

There were no non-clone ingame shots of Rome...