Martin, I dont know which is better but I have been using an include file of approx. 36 items as a template for my pages....I find I have to remake it everytime I add a new element, as it doesn't seem to respect the z-order of new items when added to an already saved include,but elements already contained are easily editable within the page properties. I dont even want to think about single pages.... :p
The two methods are the same; the only better thing that jtarin says is that using only an include page you will respect the z-order of all elements...