What are the similarities and fundamental differences between an amoeba and a leukocyte of a multicellular organism?

Amoeba and leukocytes have the following comparison signs:

Amoeba and leukocyte – eukaryotic cells
Amoeba is a unicellular organism, a leukocyte is one of the types of cells in the connective tissue (blood) of a multicellular organism. That is, an amoeba can live independently, but a leukocyte cannot.
Both amoeba and leukocyte have organelles of movement – pseudopodia (pseudopods); have the ability to phagocytosis.
Amoeba can form a cyst – an additional protective shell from adverse living conditions.