A hummer would provide a more unique and extravagant experience, with its spacious and luxurious interior, large windows for taking in the views, and a built-in sound system for setting the perfect ambience. It would also be an excellent option for larger groups, as it can comfortably seat up to 18 passengers.
A limousine, on the other hand, would offer a more classic and elegant experience. It would also have a spacious and luxurious interior, as well as large windows for taking in the views. However, it typically seats up to 11 passengers, making it a better option for smaller groups.
Both options would provide a comfortable and enjoyable experience for a private wine tour in Melbourne, so it ultimately comes down to personal preference and the size of your group.