I will try to introduce them briefly below. First of all, you should see (if you have not earlier done it) what is the state of your wall. If that wall is not smooth or cracked, the paint does not manage to hide those shortcomings. So, the paint on the wall will look just wrong. Putting thick wallpaper will be much better and more effective solution in this case. Second, you should consider the future changes in the design. Changing the color of paint is more painless to implement. In the case of better paint, you wouldn’t even need to wipe the old color – it is enough to paint wall with another color. Therefore, if you plan to modify color of the walls often, painting is be more convenient for you. You should also answer the question, what kind of pattern you want to see on the wall. If you prefer simple colors or simple patterns, then you can use either paint or wallpaper – . If you prefer to have on the wall a pic with a large, complicated pattern, the wallpaper would be more appropriate. If you are avid traveler, probably you would enjoy map mural.
If your son is a football fan, he would absolutely like to receive stadium wallpaper. Nevertheless, the official living room will probably look better with simple colour. Another important factor is cost of paint and wallpaper. Nevertheless, in that case it is pointless to generalize, as prices differ and strongly depend on the particular kind of wallpaper or paint. The simplest solution to check that is to compare various products from a price range that you can afford. In summary, the choice between paint and wallpaper hugely depends on the state of your walls, your preferences, the type of space but also on the financial resources you are willing to spend on this.