1) These packages like G & F are packages of various features. I dont know which package has what, but I know that the definition of "package" in autos is a company-designed set of features at lower price than if those components were bought and installed separately.
2) Vitz pre 2005 had 1.0L which was the common one, 1.3L & 1.5L sport model. Although 1.3 Im not so sure about...
The new Vitz 2005- has a 1.3L which is the common one and 1.5L as well, which is rare.
3) The older shape was smaller with a smaller engine; the new one is much more powerful, its very, very agile.
4) Vitz is no problem in hilly areas like Abbotabad. It runs smoothly on petrol at least, however CNG I cannot comment because 1000cc Automatic on hills and on CNG....i dont know