Variations of Greedy Algorithm
I have no clue what these various types are. You might want to ask the Wikipedia author who added these types, Wleizero. I can add to the list other types, such as double greedy algorithms, randomized greedy algorithms, reverse delete algorithms, and probably many more.

There are several frameworks for greedy algorithms which might interest you, for example priority algorithms studied by Allan Borodin and his coauthors. However, a laundry list of algorithms does not make a classification. I suggest you just ignore this list of types.