The difference for me is that I'm not moved at all by the Twizy. I think it's the loft line, or profile. The Twizy body is symmetrical front to back. The Arcimoto respects the aerodynamic Template we're so fond of in the Aerodynamics sub-forum.
A closer comparison is the [gas-powered] Elio. A better comparison is the Edison2, which is still
headed toward production. Their plan is a four-wheel four-passenger electric at a $12K price point.