You are right Ron!

The roof looks much better and gives a much smoother and sportier shape to that car. Also I agree, the wheelbase seems indeed a bit longer and the area behind the rear wheel is longer, too! Two ideas pop into my mind:

1. the wheelbase and car is longer as the wheigtbalnce will move ahead of the axle (mid-engined)

2. the engine gets much bigger (maybe 8 or 10 Cyl), thats also the reason why the back changes more and is thatfore heavier camoflaged as the front. where they still can keep the 997 look until the "ready" product comes. In the rear they cant stick to the 997 look for camo as it is totally new