Please could you explain the presentation of internal conflict in Shakespeare's "Macbeth" in contrast to Browning's "Porphyria's lover"?

The protagonist in Shakespeare's Macbeth
reveals his self-divided psyche in a number of soliloquies and asides. The
inner conflict in Macbeth is between good and
evil, between the fair(conscience) and the
foul(ambition), colaterally operative in him. Even Lady Macbeth
becomes a victim of mental disorder because of the conflict between her natural feminine
self and the assumed masculine cruelty. In Browning's dramatic monologue,
Porphyria's Lover, the spaking persona is a guilt-stricken soul
divided between his possessive love for the woman and his lurking fear to be dispossed
of the same. The poem reads like a psycho-analytic confession of guilt of a person who
chooses to kill his beloved only to perpetuate his love. Shakespeare's play is modelled
on the Morality structure to dramatize the theme of
self-damnation.