What is the difference between a Tree Lopper and an Arborist?

http://www.imfaceplate.com/treeloppinggcqld35/what-is-the-difference-between-a-tree-lopper-and-an-arborist

One of the most pressing needs after a thunderstorm is to truly have the branches and leaves of the trees in a compound trimmed. Here a differentiation needs to be made between the Arborist and the tree lopper