well, i've got a 2007 black Vitz.
the sound of the engine is louder as compared to other cars because of this one being a 3 cyl engine. also becuase the engine bay is small, so the engine is a bit more closer inwards. but after a while you will get used to it.
The new shape esp. in BLACk looks just amazing. and keep it on Petrol. dont go for CNG. Average is amazing too. Check out my ride. its just amazing.
and the newer model vitz is a VVT-I engine. Even though it doesnt say under the hood but you make sure it is a VVT-i. It is a 1KR-FE engine. according to wiki it has 4 cylinders per valve, and its a VVT-i. Just google 1KR-FE and go to Wiki and you will know more about this engine.