It depends if you mean “the other side of the street” or “the other side of the world”.
The grass on the other side of the street is greener because I live across the street from a park, so all the grass is on the other side.
The grass on the other side of the world is less green because I live in EY which is the best place in the world.
The grass on the other side of my life is less green because I’m happy I’m me, Boruch Hashem, and I wouldn’t want to be anyone else or have anyone else’s life!