Gavin loves scooters, I'm sure he'll be along shortly : )
At one time the 2012 Enertia was supposed to bring the same improvements as the Plus - less restrictive handlebar maximum turn, Perm 126 motor, O-ring chain, etc - just with less capacity and at a lower price point. I don't know if these plans are still in place. They could easily build a smaller Enertia by taking two BPM 44/70 modules and
I don't know how many Enertias were sold in Europe, but you might be able to find a stellar deal on a gently used Enertia Classic. If you're happy with the lower capacity battery, it might represent a good deal vs a new improved Enertia.