I only like Liana LXI variant,,,,as its the only car with FF cng and ABS,,,alongwith Landi Renzo Omega or SIS kit which itself is quite of a worth in market,,even the RXI version is good but lacks abs,,Vitz is good but if driven on petrol no cng,,as in a hatch no boot space is left which according to me is the biggest disadvantage,,,personally i have driven liana FF cng many a times but havent got any hands on experience with vitz,,,but one thing is for sure if cng is the fuel you select then surely liana is a good sedan where you have to pay no extra kit installation charges with one big cylinder as ff cng is with two,,,no after market spacers to play with the alignment and brake skidding issues as whole equilibrium is disturbed at times....just my 2 cents