The price is similar (12000-14000vt) and you will get much more out of travelling with a local. If you hire a bus and driver for the day, you can have as many people in the bus as you like, he can show you places that are not sign posted or easy to find, give you cultural information, take you into a village, school etc. Some restaurants on your way around the island eg Wahoo Bar at Havannah will also give your driver a free lunch.
The driving in Vanuatu is on the other side of the road too. If you do hire a car an auto is a bit easier, one less thing to cope with!
If you do hire one I recommend Hertz as they have a good range and are good to deal with. Call them the day before and book from your accommodation if you want a particular type of car (eg Auto).
Edited: 1:18 am, August 27, 2012