`` What is the difference between '' `` Regards , '' '' '' `` Best regards , '' '' '' `` Sincerely , '' '' '' `` Yours Faithfully , '' '' and all of the other formulations ? Which one is the best to use in North America in an email conversation ? ''
`` What is the difference between '' '' F**king - Unbelievable '' '' and '' '' Un-F ** king-believable '' '' ? Which one is best or we should use ? ''