Browning "Porphyria's Lover" and "My Last Duchess"

What do the opening lines of Porphyria's lover sound like? Are they more Romantic or more Victorian? Why?

 

What are the characteristics of the woman in the poem? Is she more Romantic or more Victorian? Or, is she perhaps both at separate times in the poem? Why? 

 

Why do you think he strangles her?

 

Why does the Duke kill the Duchess in "My Last Duchess"?

 

How do "My Last Duchess" and "Porphyria's Lover" relate to one another?