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

https://astro-wiki.win/index.php?title=Differentiating_Between_A_Tree_Lopper_And_An_Arborist_19050

One of the most pressing needs following a thunderstorm is to really have the branches and leaves of the trees in a compound trimmed. Here a differentiation must be made involving the Arborist and the tree lopper