If you get the vios, you might not want to drive your Altis anymore as your current car is less responsive. But the altis and the vios are very similar cars and even share some of the same parts. If you are comfortable and satisfied with the Toyota service, maintenance and performance then go for another toyota. If you want a change, try the City 1.5 Vtec. It has more features as it is the top of the line subcompact car of Honda versus the entry level compact car that is the Civic.