As everyone commented, myvi and preve served different purpose as i have myvi manual 2007 and preve CFE now...

Myvi manual 2007:
FC: 17 - 18 km/h
Recommended speed limit 100km/h
Lack of driving enjoyment
Lack of boot space (problem for a family)
Parking easy job
Engine no enough ohmmmmm
Maintenance I think myvi is the winner, no major spare part replacement yet for 7years @ 90k km

Preve CFE
FC: 11 - 12 km/h
Recommended speed limit 130km/h but still can go further, much more stable compare to myvi
Have driving enjoyment as especially CFE version with GPS, auto wiper, auto headlamp, etc
Big space no matter boot space or cabin space
Can add reverse camera on CFE head unit
Parking is a big problem for a huge car
Engine have enough ohmmmmm especially used sport mode or paddle shift
Maintenance no idea yet

My advise: go for myvi if u don't plan for family yet for the next 5 years if salary wasn't that high, save the money for ur plan such as buy house or wedding plan... Otherwise u may regret y u spend so much money on car while u looking for money desperately...