First, do u wish to drive on CNG,
If yes, the go for new swift,
if no, go for Vitz BUT do keep in mind about the Re-sale, and it cant be converted to CNG in future, So my openion Go for Swift, later u can convert it to CNG, If wish.
my cousin bought cultus 2011 10 days ago, for 938k + tpt + etc + etci would prefer vitz or santro over cultus..
Vitz is an excellent Car..and its Japanese also
go for swift if u r not concern abt resale in near future