Can someone compare and contrast "The Interlopers" by Saki and "The Cask of Amontillado" by Edgar Ellan Poe ?

Very interesting question. Of course, both stories contain
two characters of whom at least one hates the other and wants to gain vengeance. Both
stories end in at least one death and both contain grimly ironic
humour.

But these stories are more different than the same.
Let us think about the point of view. "The Interlopers" uses omniscient point of view
whereas "The Cask of Amontillado" famously uses the first person unreliable narrator to
show us the demented mind of Montresor. "The Interlopers" depicts a feud between two
families going back through centuries but which is actually halted due to the shared
experiences of the two main characters. "The Cask of Amontillado" is about a secret
feud, of which the justification is extremely doubtful. Lastly, tragically but
ironically, the two characters in "The Interlopers" both die in a tragic twist of fate.
"The Cask of Amontillado" ends with the death of the poor unsuspecting Fortunato at the
hands of the lunatic Montresor.

Both stories deal with
revenge yet have radically different perspectives on it. For Montresor, revenge is what
consumes him against a supposed insult. He plots a criminal way of ensuring that he is
able to dispense revenge himself in a horrendous fashion. In "The Interlopers", both
characters begin consumed by revenge, but actually spending time with each other shows
them each other's humanity and ends the feud between them. However, ironically, in spite
of this, they die together at the hands of wild wolves.