Swift has much more ground clearance as compared to Vitz. Vitz hits nearly every speed beaker but Swift does not hits with any speed breaker even if 4 persons in car.
Swift has better Ground clearance and engine as compared to Vitz.
But Vitz is better in Metal quality, Paint quality, Quality of interior plastic and over all material of Vitz is better than Swift.
(Concluded these results after comparing my Swift with my friend's Vitz)