They're both about wealthy enigmatic characters (albeit the count of monte cristo book doesn't keep the count's purposes a mystery) who throw extravagant parties. Both characters seem emotionally distant and turn out to be excessively obsessed with the past. They both feature a lot of tragedy and revenge and the titular character meets their love from long ago who is now married to someone else.

They both have connections to the criminal underground, they both anger the husband of their love causing death.

Not exact duplicates by any means, but the similarities are there.