What is the difference among the functions performed by

 

the Paste from Word button,

the regular Windows paste when there is Word formatting in the text in the Clipboard, and 

Paste from Plain Text button when there is Word formatting in the text in the Clipboard ? 

 

All three give you the same prompt: "Do you want to remove the Word formatting?" 

 

They all seem to do the same thing. Is this true that they all do the same thing?