That's actually a rather good comparison. Both have learning cliffs of doom[1]but once you've spent a few months with them they're arguably more powerful than the other options. They're usually fast to use but very hard to learn. I wouldn't say either one is easy though.

[1] https://dementiagaming.files.wordpress.com/2010/08/learning_...

That's debatable. I don't think anyone has actually made any study which proves that git is superior to Mercurial or that vim is superior to Notepad++ or Sublime.