Exterior Looks are subjective but you wont be bored to see a 2011 POLO but not the same applies for i20.
Interior(Features, Space & Comfort) Best in class materials, I would say. It make 14L Honda City to feel shy on this area.
It misses keyless entry feature of i20 but packs all premium features like Cruise control, Auto door lock, Auto pinch windows, Can roll down the window glasses using remote etc. It swallows potholes very nicely. You can cover 750 at a stretch without feeling fatigue.
Engine Performance, Fuel Economy and Gearbox 1st gear is very short but it needs only to move the car, in all other situations 2nd gear would do.
FE - In Chennai city traffic I used to get 17 to 19. In morning times(without traffic) if I drive @80-90Km/hr it yields 20-24(really!, ive snaps). At highways I used to cruise in 160 -180 Km/hr with 4 on board and FE is around 17-18(Ive done 22000 Kms in 9 months). Unlike other cars Polos FE dont drop drastically if we drive very fast.
Ride Quality & Handling Mature ride and handling even at high speeds. But on some specific cornors we can feel the body roll which is very much contained in its elder bro Skoda Rapid. But still best handling car next to fiat and old generation Figo.
Final Words You will never regret for chosing a POLO. It simply outclass all its rivals in every department(in spare parts cost too