US EPA changed the cycles to account for more aggressive and therefore real world driving for MY17s...Not difficult to get 20% better in most models whether a Volt or an ICE Hellcat...
If they're the same (they might not be) perhaps you could buy them? Best guess is with the silver grills it looks more consistent with chrome headlights...However since the Bolt EV has a dark gray and black grills, probably a safe bet as soon as MY18 the Volt will follow suit with darker grills and who knows, adopt the Velite's black trimmed headlights...Another question is why the does Velite have black headlights and the US version has chrome/silver headlights.
Gen 1 has black headlights which is aesthetically better looking than silver yet they didn't make that black on Gen 2 which is stupid
Stupid stuff that pisses me off lol