Every variant gets 60:40 split fold seats and rear air-cond vents but that's where the similarities end. Apple CarPlay and Android Auto is available on the E, V and RS variants, LaneWatch is available on the V and RS variants. If you want the best of the best though - including Honda Sensing - then RS is the variant you should go for.
Yes, Honda City has Seat Features(Front-Driver), which are: 2019 Honda City 1.5 E, 2019 Honda City 1.5 Hybrid, 2019 Honda City 1.5 S, 2019 Honda City 1.5 V.
Yes, Honda City is available in Screen Size(inch). The available Screen Size(inch) variants are: 2019 Honda City 1.5 E, 2019 Honda City 1.5 Hybrid, 2019 Honda City 1.5 V.