Don't know the difference between a tree lopper and an Arborist?

https://delta-wiki.win/index.php?title=An_Arborist_or_Tree_Lopper%3F_How_to_Tell_them_apart_19122

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 must be made between the Arborist and the tree lopper who