Polo v/s Swift v/s i20

Hi Folks,

Can you guys let me know the comparison b/w polo base, swift lxi, i20 magna petrol versions on the following attributes. (assuming base petrol model)

1. seating comfort (both front and rear)
2. fuel efficiency in city & highway
3. expected cost of polo base on-road (bangalore)
4. *** of volkswagen in general (i know maruti and hyundai are great)
5. any other factor that i need to consider

Thanks !!