Your comment is old I know may be you made ur decisions but let others people switching from vitz to swift get some points .
I also sold out my vitz and bought a swift dlx 2014 model.
In my experience swift is not too bad in fuel economy within city rush drive getting 10kmpl with chilled ac on the other hand vitz 1.0 is lazy car you can get maximum fuel average of 11 to 12(some people claim they get 15, 16 sounds annoying) in city drive. For 2 to 3 kmpl you compromising your driving pleasure is not a wise decision imo. Swift negative point is comfort level vitz has a better comfort level ( cause its jdm). Swift +point is pocket
. Getting up to 10kmpl in city drive and 14 to 16 on highway u can get maximum on highway under speed limit as well.