It is believed that the design for the Interplanetary Transport System revealed in 2016 has been changed.
The new Mars launch system will likely be 9 meters in diameter instead of 12 meters. This will allow it to be built in the current Spacex factories. This will likely mean 21 raptor engines and not 42 engines like in the 2016 design.
The 2016 ITS had a very large crew section. It is not clear how the crew section will change and how the Mars landing portion will change.