I have used git a lot, and rarely, if ever, get it into a confused state. I have used Mercurial less, and I have found it easy to get things tangled up without a clear way out.
It kinda sounds like the system you know best, is the one you can handle better regardless of whether it's git or Mercurial.
> It's a valid comparison for his point that Mercurial is much more reliable for his workflows than git
To me it reads as a warning that Mercurial repos are prone to being screwed up even if the user has over a decade of experience avoiding Mercurial's traps while with Git only bold inexperienced users can screw up repos in a similar matter.