Splendor is for more mileage, but body vibrates above 60kph. Passion plus gives a little lower mileage, but is stable, sturdy, and keeps steady till 80kph. Passion+ is my choice.....
I drove passion for 65000 KMs so far and am absolutely happy with the bike. If mileage is only concern, go for splendour. But if you ask me which is better bike, then I prefer passion for its....