If you carefully watch the "full Cast and Crew" for "Buddy, Buddy", you can notice that the original play and the screenplay are from Francis VEBER, who also wrote the original screenplay of the 1973 movie by Edouard MOLINARO. Chronologically : 1973 - L'Emmerdeur, by Edouard MOLINARO / 1981 - Buddy, Buddy by Billy WILDER / 2008 - L'Emmerdeur, by Francis VEBER. So, before "noticing" that a movie reminds you of another movie, and maybe suggest that it is a "copy", please go through the "full cast and credits" and READ the names of the people who wrote the screenplay, or the original book or play... This could avoid some unneeded comments. Thank you.