Ritz Zxi Advantages:
Ritz is a tall boy design (better ingress/egress), Airy Cabin, Higher Seating position (good overall view), thicker and supportive seat, under parcel tray (co-passenger side), adjustable headrests (front & rear), a great K Series engine (powerful, smooth and frugal with good gradeability), more informative MID, Rear Split Seat 60:40 (extended cargo space if needed), Robust body (Ritz 1030 Kg / heavier than Swift, Swift Dzire, Grand i10), Got NCAP rating (4 Star in Euro NCAP), Wider Tires (better stability), higher ground clearance (better Ramp Breakover angle to negotiate rough roads), better highway capabilities, Unique design and road presence, ABS+EBD+BA (Grand i10 has only ABS, no EBD+BA on Grand i10), Front ventilated Disc (reduced brake failure), Dual Horn (Grand i10 has single horn only), Rear Fog lamp (Grand i10 has no rear forg lamp), Speed Sensing auto door lock, Alloy Spare Wheel (Grand i10 is not giving alloy spare wheel) Audio Remote Control, Good turning radius, shorter bonnet (good for city driving), good discount (extends the VFM value), Maruti Service Network (easy to maintain), good resale value, proven machine (around for some time), rave reviews from owners (least complaints from users)
Grand i10 Asta (O) petrol Advantages:
Feature loaded - Dedicated rear A/C vent (first in segment), chilled glove box (quite useful), bluetooth, inbuilt media storage 1 GB (first in segment), push button start stop, luggage lamp, Gear shift indicator, master switch on fuse board, Reverse parking sensor, cool dual tone interior, Integrated turn indicators on ORVMs, chrome outside door handles, cute and neutral design, roof rails, electrically foldable ORVMs, larger boot 256 L (Ritz has only 236 L), more legroom for the rear passengers, newest in the segment (Ritz around for some time), customized fairly to local requirements and taste, good initial reviews by auto magazines, exciting sales figures.
Please correct or add if any.
Both cars are good. Two of the best hatchbacks in India with its positives and negatives. Take TD back to back and choose the car you are more comfortable with. cheers.