Brother i have paid 14lacs price for the car and as for comparison ill post few points.
1.handling is same of both cars but swift is very very stiff in bumpy roads and seats are very hard not suitable for longer trips whereas i vitz is very soft car.
2.swift has better engine performance generally and vitz is not very responsive but i feel like it is not bad aswell and consumption wise it is much better then swift aswell.
3.suzuki swift is really really bad in build quality.it was my first and last suzuki car,if u are coming from toyota then u need to start gyming to close doors of swift lol.when i tried vitz i was blown away with smooth drive and build quality.
The only thing i like in swit was its responsive pick.it was like fast engine with a donkey