Good evening George, I use the green foam for scenery and making retaining walls.
What I like about the green is when it comes time to paint or weather the green color is not as hard to cover as the pink with paint.
I attached a couple of photo's of retaining walls I made out of 1" thick green foam.
It is amazing how tight of a bend you can put in the foam before it actually snaps.
Good luck have fun !!!!!!