If the villas are full they will offer you a live out allowance with the option to move back in to a villa, if one becomes available. Keep in mind once you are in, you are in! Unless you buy a property.
Heights villas are smaller with a smaller garden, they are like town houses, not that bad. South villas are bigger with bigger gardens. Maids room is outside in Heights while south has it inside.
Heights location might be better for some. South is closer to DSO.
Anyone else wanna add some pros and cons?