What is the difference between find-grep and grep-find?

What is the difference between find-grep and grep-find in Emacs?

From stackoverflow

• They seem the same. See the manual

• You can use M-x describe-function (or C-h f with default keybindings) to answer this question, here's the output for find-grep:

  find-grep is an alias for `grep-find' in `progmodes/grep.el'.
  (find-grep COMMAND-ARGS)
  ...