well the difference is obviously the graphics cards, the fps they can run and many more, of course you can improve these by installing new operating systems compatiable for that system. you can also install graphic cards that dont necissarally go with that computer, another difference is how smoothly they can run certain programms and games.
Overlay analysis is an approach, taking in data from two or more layers to create a single output layer.
For example, if we have a layer of land use and a layer of soil fertility, we can derive from the two layers the percentage of agricultural land developed over fertile soil.
