The grass is always greener in the other side?

Depends on which side you are standing and from the angle you see the grass. Seeing grass from a distance the viewing angle is much lower and this will hide the imperfections in the grass, giving the illusion that the grass is completely green. However, when you walk closer and you are viewing the grass from a top down view all the dirt spots and dead grass is revealed.

Because of this trick of the brain you will always perceive grass in the distance than much greener as the grass on which you are standing.