Both of the story there curiosity gets the best of them. There curiosity releases there worst fear. For "Pandora" box it releases evil on the world and in the "Monkeys Paw" the father sees his worst fear of his dead son and see's a crippled son of his that was a zombie.
In the monkeys paw they lose their beloved child to a crippled machine. His death was long, painful and glory too. When he came back in the story they had very creepy. He came back as an evil creature just like the ones that came out of the box on the Pandora's. This is mildly simular because there was gools released from the box caused fear through people.
Similarities in the story is that they're both willing to make sacrifices for there love. in the story the monkeys paw he was willing to make the sacrifice of losing his son a second time to protect his wife from the hateful sight. and in Pandora's box Epimethius was not infuriated with Pandora releasing the energy because he loved her too much.
One of the differences between the stories is that they take place in completely different time zone. Pandora's box has to be in an early time frame or else no evil at all could have been in the story of monkeys paw. evil was released on the world causing everything else to happen.
The stories where created in completely different time one one being in the 750 BC and the other being in 1902 witch explained why some stories may be altered or have slight changes over the time.
each of the stories where written in the purpose to entertain to explain a lesson. Pandora box is to explain a lessen and while the monkeys paw is used to provide readers for an airy feeling and a scary mode. Pandora box was written with the intend to explain the evil in the world.