Hi Holly. The one to the front is Sedum spathulifolium pruinosum purpureum, and the one on the left is Sedum spathulifolium 'Cape Blanco'. Both are pretty hardy. Here is a picture of Cape Blanco growing on a rock. Notice the difference in the color? Different times of the year it will look more green and other times it has a real powdery grey color. I really love it.
