Anything with big wheels is going to roll over crap roads or trails better than smaller wheels. Its the reason 29ers have won out over 26" and 27.5" in bicycles. If it weren't for the traditional Vespa small wheel scooter look, the small wheel premium scooters might die out. CLEARLY, Europeans and Asians have embraced larger wheels wholeheartedly and overwhelmingly.
If I were buying my first premium scooter today, it would not be a small wheeled scooter. Would I add one (a Vespa) later? Sure!