“The grass may be greener on the other side, but will the sky be as blue?”
“The grass may be greener on the other side, but you still have to move the lawn.”
“The grass is always greener on the other side.”
“The grass isn't always greener on the other side it's greener where you water it”
“The grass is not always greener on the other side of the fence. The grass is greenest where it is watered.”
“Grass isn't greener on the other side of the fence ... it's just a different kind of grass.”