How do Willy's and Dave Singleton's deaths compare and contrast in Death of a Salesman?

One of
the most poignant aspects of s play is that Willy increasingly feels envious and judges himself
as inferior to other people. The deep-seated sense of failure that leads to his suicide haunts
him and poisons what should be his closest relationships: his relationship with his
sons.

Only Linda seems to understand what eats away at him, as she retains
an image of her husband in his more optimistic youth. Even in considering another mans death,
which occurred while Dave was working and far from his family, Willy manages to bring envy into
the situation. He thinks not of the sorrow the family...