Mr.White and Pandora's curiosity both brought grief to their peers. When Mr.White wishes for money, he loses his son and his wife became depressed. When Pandora opens the box, many evil spirits came out like War and Crime can lead to sadness to others.
One similarity is that they both have large curiosity. Mr. White didn't have to take the paw. Pandora didn't have to open the box. But their curiosities led to their bad decisions.
One difference that Pandora and Mr.White both have is that both of their curiosities lead to others being harmed. When Mr.White used the paw, his son died. When Pandora opened the box, sickness came out.
Another difference is that the level of seriousness is different. Mr.White using the paw only affected his family. While Pandora opened the box it affected the whole world.