The Little Mermaid

In the original version, the Little Mermaid feels an indescribable amount of pain every time she takes a step - due to a curse the witch put on her.
The Little Mermaid has a mother in the original - her mother is dead in the ディズニー version.
The Captain that the mermaid falls in 愛 with marries another woman (whom he had been in 愛 with in the first place) - in the ディズニー version the Little Mermaid gets the prince!
The Little Mermaid's sisters offer her a ナイフ to kill the prince so she can return to the see in the original.
The Little Mermaid dies at the end (turns into sea foam) - she kinds of commits suicide - because she cannot bare to see the prince with someone else.

Snow White

In the original - the クイーン requests the lungs and liver (as well as the heart) of Snow White to eat for ディナー that night.
In the original - Snow White is not awakened によって a キッス from the prince (like the ディズニー version) - she is awakened when she is jostled によって the horse on which her coffin is being carried によって the prince.

Cinderella

In the original - the step-sisters of シンデレラ try to cut off different parts of their feet to make them fit into the glass slippers.
The Prince is alerted of the step-sisters によって two carrier pigeons who then peck out the step-sisters eyes. The step-sisters live as blind beggars for the rest of their lives.

Sleeping Beauty

Woman is put to sleep because of a prophecy (not a curse) in the original.
In the real original (not Brothers Grimm version) - Sleeping Beauty is raped によって the King (her father) and is awakened when her child sucks the piece of 亜麻 that was keeping her asleep out of her finger.