According to Kia website, Kia Rio is only $1k more expensive than Picanto. For $1k more u get a bigger car so why this car is not as popular as Picanto?
http://www.kia.com.sg/finance/prices.asp
Picanto is cute, and if I am not mistaken, it has more head room than Rio. Being of a newer design does make it a much more eye catcher than Rio. Further more its better FC and Smaller CC would means a more affordable maintences cost, ideal for the young and single alike!