You can read some of my reviews on ElectricBikesnz.com
The 5.0 and 6.0 have the same motor, a 1.2S. that is more powerful than the 3.0/4.0 motor. The Levo is more torquey, but couldn't handle the stresses of commuting (constant load for an hour). That's why the Vado doesn't use v1.3