Depends on what you prefer - Power or fuel efficiency
I have been using cultus for an year and on the ISB roads, it easily does 575 km on a full tank, say 30 liters. Swift would never do.
Cultus is brisk for a 1.0L engine and easily goes up to 150kph on open roads/motorways. Does good on steep roads like murree, etc..
The only thing which i dont like is the shake it gets when a heavy vehicle passes by on a motorway which probably is due to its light weight ...
Swift on the other hand is much more stable due to being the heavier of the two and also drives better due to +20 to 25 bhp in contract to Cultus.. however swift is less spacious and ironically less comfortable for passengers.. i have found cultus more spurious..
Swift's steering is more responsive for sure. clearly a better drive..
Overall - Cultus if you are willing to compromise a bit on drive
